Equity - AOCI Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Changes in the balances of each component of AOCI
Balance at the beginning of the period	$ 377,064	$ 421,798	$ 374,512	$ 437,775
Total other comprehensive income (loss), net of tax	(130)	20	23	58
Balance at the end of the period	395,331	411,026	395,331	411,026
Accumulated Other Comprehensive Income
Changes in the balances of each component of AOCI
Balance at the beginning of the period	2,047	1,858	1,894	1,820
Total other comprehensive income (loss), net of tax			23
Balance at the end of the period	1,917	$ 1,878	1,917	$ 1,878
Foreign Currency Translation
Changes in the balances of each component of AOCI
Balance at the beginning of the period			1,861
Total other comprehensive income (loss), net of tax			(30)
Balance at the end of the period	1,831		1,831
Unrealized Gains (Losses) on Available for Sale Securities
Changes in the balances of each component of AOCI
Balance at the beginning of the period			33
Total other comprehensive income (loss), net of tax			53
Balance at the end of the period	$ 86		$ 86