Equity - AOCI Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in the balances of each component of AOCI
Balance at the beginning of the period	$ 408,374	$ 374,512
Other comprehensive income (loss)	(19)	153
Balance at the end of the period	412,461	377,064
Accumulated Other Comprehensive Income
Changes in the balances of each component of AOCI
Balance at the beginning of the period	1,846	1,894
Other comprehensive income (loss)	(19)
Balance at the end of the period	1,827	$ 2,047
Foreign Currency Translation
Changes in the balances of each component of AOCI
Balance at the beginning of the period	1,866
Other comprehensive income (loss)	(30)
Balance at the end of the period	1,836
Unrealized Gains (Losses) on Available for Sale Securities
Changes in the balances of each component of AOCI
Balance at the beginning of the period	(20)
Other comprehensive income (loss)	11
Balance at the end of the period	$ (9)