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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Tax Disclosure [Abstract]            
Income tax expense (benefit) $ 2,316     $ 1,042 $ 9,758 $ 8,700
Effective tax rate (as a percent) 19.50%     13.30% 29.90% 30.60%
Federal statutory rate (as a percent)         35.00%  
Reduction of effective income tax rate due to discrete event (as a percent) 13.30%       4.80%  
Excess tax benefit from windfalls related to employee stock compensation $ 1,571          
Deferred tax assets, release in valuation allowance       $ 1,908    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock vested during period (in shares) 128,500 0 0