Income Tax Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Net interest and penalties expense	$ 324	$ 414	$ 583	$ 1,152
Accrued interest	2,572		2,572		$ 2,127
Accrued penalties	1,773		1,773		1,758
Unrecognized tax benefits related to uncertain tax positions	113,552		113,552		112,558
The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate	$ 112,273		$ 112,273		$ 111,224