Schedule II - Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 1,073	$ 1,508	$ 1,749
Charge to Costs and Expenses	161	32	(60)
Utilization of Reserves	(115)	(417)	(300)
Other	(13)	(50)	119
Balance at end of year	1,106	1,073	1,508
Deferred tax valuation allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	3,828	4,220	4,879
Charge to Costs and Expenses	13,338	561	283
Utilization of Reserves	(10)	(602)	(1,164)
Other	(603)	(351)	222
Balance at end of year	$ 16,553	$ 3,828	$ 4,220