Provision for Income Taxes from Continuing Operations (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current provision (benefit)      
Federal $ 2 $ (11) $ (69)
State 34 34 63
Foreign     2
Deferred provision      
Federal 3,786 874 4,139
State 0 0 0
Tax benefit of equity adjustment for stock option exercises and restricted stock vesting (1,231) (76) (4,227)
Valuation allowance 21,686 651 16,400
Other   283 258
Total income tax expense $ 24,277 $ 1,755 $ 16,566