XML 54 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Effective income tax rate 92.00% (23.00%)  
U.S. Federal statutory rate 21.00% 35.00%  
Excess tax benefits on share-based compensation $ 700 $ 2,400  
Deferred tax assets $ 17,524   $ 20,076