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Other Assets - Summary of Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid Expenses $ 4,109us-gaap_PrepaidExpenseCurrentAndNoncurrent $ 3,703us-gaap_PrepaidExpenseCurrentAndNoncurrent
Interest rate swaps 10,080us-gaap_DerivativeAssets 10,846us-gaap_DerivativeAssets
Other Assets 11,012us-gaap_OtherAssetsMiscellaneous 6,375us-gaap_OtherAssetsMiscellaneous
Total $ 25,201us-gaap_OtherAssets $ 20,924us-gaap_OtherAssets