XML 126 R77.htm IDEA: XBRL DOCUMENT v3.6.0.2
Income Taxes - Reconciliation of the Beginning and Ending Amounts of Unrecognized Income Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Contingency [Line Items]      
Ending Balance $ 19,700    
Federal and State [Member]      
Income Tax Contingency [Line Items]      
Beginning balance 24,213 $ 19,122 $ 13,519
Increase due to prior positions     1,493
Decrease due to prior positions (7,109) (2,382)  
Increase due to current year position 2,550 7,473 4,110
Ending Balance $ 19,654 $ 24,213 $ 19,122