Equity - AOCI Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Changes in the balances of each component of AOCI
Balance at the beginning of the period	$ 423,735	$ 395,331	$ 408,374	$ 374,512
Other comprehensive income (loss)	(33)	(60)	(76)	(37)
Balance at the end of the period	435,313	398,093	435,313	398,093
Accumulated Other Comprehensive Income
Changes in the balances of each component of AOCI
Balance at the beginning of the period	1,803	1,917	1,846	1,894
Other comprehensive income (loss)			(76)
Balance at the end of the period	1,770	$ 1,857	1,770	$ 1,857
Translation adjustment
Changes in the balances of each component of AOCI
Balance at the beginning of the period			1,866
Other comprehensive income (loss)			(60)
Balance at the end of the period	1,806		1,806
Unrealized gain 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)			(16)
Balance at the end of the period	$ (36)		$ (36)