Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Income Taxes Unrecognized tax expense (benefit) roll forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]        
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 23,417 $ 26,053 $ 10,808 $ 5,462
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 2,025 2,585 3,158  
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions   13,733 $ 2,188  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions $ 4,661 $ (1,073)