Annual report pursuant to Section 13 and 15(d)

Reconciliation of Net Deferred Tax Liabilities to Financial Instrument (Detail)

v2.4.0.6
Reconciliation of Net Deferred Tax Liabilities to Financial Instrument (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred Tax Assets And Liabilities [Line Items]    
Deferred income tax asset per balance sheet $ 6,248 $ 6,403
Deferred income tax liability per balance sheet (47,593) (48,077)
Net deferred tax liabilities $ (41,345) $ (41,674)