Income Taxes Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 6,032	$ 6,851	$ 492
Current State and Local Tax Expense (Benefit)	2,422	2,532	1,865
Current Foreign Tax Expense (Benefit)	7,290	7,994	9,136
Current Income Tax Expense (Benefit)	15,744	17,377	11,493
Deferred Federal Income Tax Expense (Benefit)	(5,319)	(6,720)	(9,118)
Deferred State and Local Income Tax Expense (Benefit)	(1,850)	(325)	(3,072)
Deferred Foreign Income Tax Expense (Benefit)	2,049	3,340	(5,722)
Deferred Income Tax Expense (Benefit)	(5,120)	(3,705)	(17,912)
Income Tax Expense (Benefit)	$ 10,624	$ 13,672	$ (6,419)