Quarterly report pursuant to Section 13 or 15(d)

Schedule of Cash Distributions Declared and Paid (Detail)

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Schedule of Cash Distributions Declared and Paid (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended 3 Months Ended
Mar. 06, 2014
Mar. 31, 2014
Dividend Payment 1st
Mar. 31, 2014
Dividend Payment 2nd
Mar. 31, 2014
Dividend Payment 3rd
Mar. 31, 2014
Dividend Payment 4th
Mar. 31, 2014
Dividend Payment Five
Dividends Payable [Line Items]            
Announcement Date Mar. 06, 2014 Mar. 06, 2014 Nov. 20, 2013 Sep. 12, 2013 May 30, 2013 Mar. 18, 2013
Payment Date Mar. 31, 2014 Mar. 31, 2014 Dec. 27, 2013 Oct. 04, 2013 Jun. 28, 2013 Apr. 01, 2013
Amount Per Share   $ 0.0575 $ 0.0550 $ 0.0525 $ 0.0500 $ 0.0500
Cash Distributed   $ 1,444 $ 1,376 $ 1,308 $ 1,240 $ 1,234