• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Income Taxes - Summarized the Differences Between the Statutory Federal Income Tax Rate and the Effective Tax Rate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Income taxes at statutory rate $ (5,468) $ 16,395 $ 37,167
State income taxes, net of federal tax benefits (657) 1,710 3,783
Effects of tax rate changes (1,400)    
Share-based compensation (705)    
Other (501) (270) (619)
Income tax (benefit) expense $ (8,731) $ 17,835 $ 40,331
Income taxes at statutory rate, percentage 35.00% 35.00% 35.00%
Increase (decrease) in income taxes resulting from:      
State income taxes, net of federal tax benefits, percentage 4.20% 3.60% 3.60%
Effects of tax rate changes, percentage 9.00%    
Share-based compensation, percentage 4.50%    
Other, percentage 3.20% (0.50%) (0.60%)
Income tax (benefit) expense 55.90% 38.10% 38.00%