Equity - AOCI Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Changes in the balances of each component of AOCI
Balance at the beginning of the period	$ 374,512	$ 437,775
Total other comprehensive income (loss), net of tax	153	38
Balance at the end of the period	377,064	421,798
Accumulated Other Comprehensive Income
Changes in the balances of each component of AOCI
Balance at the beginning of the period	1,894	1,820
Total other comprehensive income (loss), net of tax	153
Balance at the end of the period	2,047	$ 1,858
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	(48)
Balance at the end of the period	1,813
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	201
Balance at the end of the period	$ 234