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Changes in Accumulated Other Comprehensive Loss, Net of Taxes, Related to Interest Rate Swap Agreements (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive loss before reclassifications, net of taxes of $506 and $409 $ 497 $ 776
Net other comprehensive income 497 776
Interest Rate Swap
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balances (5,716) (8,867)
Other comprehensive loss before reclassifications, net of taxes of $506 and $409 (979) (636)
Amounts reclassified from accumulated other comprehensive loss to interest expense, net of taxes of $874 and $837 1,476 1,412
Net other comprehensive income 497 776
Ending balances $ (5,219) $ (8,091)