Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current income tax expense      
State and local $ 2,422 $ 3,352 $ 2,987
Total current income tax expense 2,422 3,352 2,987
Deferred tax (benefit) expense      
Federal (48,123) 7,172 (65,330)
State and local (139) (270) (6,121)
Total deferred tax expense (benefit) (48,262) 6,902 (71,451)
Net income tax (benefit) expense $ (45,840) $ 10,254 $ (68,464)