Schedule II - Valuation and Qualifying Accounts - Allowance for Doubtful Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year		$ 4,745	$ 4,753	$ 5,634
Charged to Cost and Expense	[1]	4,955	2,007	954
Accounts Written Off		(1,447)	(1,489)	(1,882)
Other		(181)	(526)	47
Balance at end of year		$ 8,072	$ 4,745	$ 4,753

[1] Net of recoveries on previously reserved or written-off balances.