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Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Unrecognized tax benefits at beginning of year $ 2,272 $ 1,864
Increases relating to positions taken in prior periods 0 20
Increases relating to current period 49 388
Decreases due to settlements with tax authorities (336) 0
Decreases due to lapse of statute of limitations (328) 0
Unrecognized tax benefits at end of year $ 1,657 $ 2,272