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Quarterly Financial Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Total revenue | $ 62,694 | $ 58,476 | $ 60,136 | $ 55,628 | $ 60,550 | $ 56,719 | $ 57,626 | $ 54,284 | |||
| Operating income | 9,690 | 8,974 | 9,287 | 6,582 | 10,219 | 8,479 | 3,862 | 7,930 | 34,533 | 30,490 | 41,999 |
| Net income (loss) before discontinued operations | 5,344 | 5,334 | 5,205 | (18,582) | 2,010 | 3,407 | (1,779) | 885 | (37) | (95) | (741) |
| Net income (loss) | $ 5,333 | $ 5,323 | $ 5,201 | $ (18,593) | $ 2,009 | $ 3,368 | $ (1,792) | $ 843 | $ (2,736) | $ 4,428 | $ 5,618 |
| Basic earnings (loss) per share | $ 0.21 | $ 0.21 | $ 0.20 | $ (0.75) | $ 0.08 | $ 0.13 | $ (0.07) | $ 0.04 | $ (0.11) | $ 0.18 | $ 0.23 |
| Basic earnings (loss) per share from continuing operations | $ 0.21 | $ 0.21 | $ 0.20 | $ (0.75) | $ 0.08 | $ 0.13 | $ (0.07) | $ 0.03 | $ (0.11) | $ 0.18 | $ 0.26 |
| Diluted earnings (loss) per share | $ 0.21 | $ 0.21 | $ 0.20 | $ (0.75) | $ 0.08 | $ 0.13 | $ (0.07) | $ 0.04 | $ (0.11) | $ 0.18 | $ 0.23 |
| Diluted earnings (loss) per share from continuing operations | $ 0.21 | $ 0.21 | $ 0.20 | $ (0.75) | $ 0.08 | $ 0.13 | $ (0.07) | $ 0.03 | $ (0.11) | $ 0.18 | $ 0.26 |
| Weighted average shares outstanding - basic | 25,255,881 | 25,126,858 | 24,737,131 | 24,632,431 | 24,726,148 | 24,663,027 | 24,356,298 | 24,564,947 | 24,938,075 | 24,577,605 | 24,475,102 |
| Weighted average shares outstanding - diluted | 26,051,098 | 25,921,391 | 25,624,350 | 24,632,431 | 25,266,368 | 25,358,052 | 24,356,298 | 24,753,671 | 24,938,075 | 24,986,966 | 24,683,644 |
| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Details
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| X | ||||||||||
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- Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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