Revenue from Contracts with Customers (Capitalized Contract Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract costs capitalized during the period	$ 61,214	$ 51,891	$ 66,607
Costs amortized during the period	(59,116)	(58,855)	(57,741)
Change in capitalized contract cost, other	(380)	307	843
Balance of costs to obtain a contract	$ 26,081	$ 24,363	$ 31,020	$ 21,311