Annual report pursuant to Section 13 and 15(d)

Income Taxes Unrecognized tax expense (benefit) roll forward (Details)

v3.10.0.1
Income Taxes Unrecognized tax expense (benefit) roll forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]        
Unrecognized Tax Benefits $ 61,500 $ 63,086 $ 23,417 $ 26,053
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 3,080 3,037 2,025  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (4,696) (458) $ (4,661)  
Unrecognized Tax Benefits, Increase Resulting from Acquisition   $ 37,090    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 52,200      
Income Tax Examination, Penalties and Interest Accrued $ 1,100