SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Credit loss reserves
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	$ 26,046	$ 19,066	$ 15,622
Charges to Earnings	88,076	78,229	64,278
Charges to Other Accounts	92	(152)	(46)
Deductions	(80,562)	(71,097)	(60,788)
Balance at End of Period	33,652	26,046	19,066
Revenue reserves
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	1,793	1,227	981
Charges to Earnings	117,239	103,627	111,069
Charges to Other Accounts	0	0	(2)
Deductions	(116,323)	(103,061)	(110,821)
Balance at End of Period	2,709	1,793	1,227
Deferred tax valuation allowance
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	77,076	71,472	58,903
Charges to Earnings	(5,925)	(235)	14,083
Charges to Other Accounts	(4,525)	5,839	(1,514)
Deductions	0	0	0
Balance at End of Period	66,626	77,076	71,472
Other reserves
Movement in Valuation Allowances and Reserves
Balance at Beginning of Period	7,495	5,057	3,919
Balance at End of Period	$ 11,360	$ 7,495	$ 5,057