Revenue Recognition - Revenue Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amounts included in contract liabilities at the beginning of the period:
Performance obligations satisfied	$ 1,858	$ 57
Changes in the period:
Changes in the estimated transaction price allocated to performance obligations satisfied in prior periods	7,645	774
Performance obligations satisfied from new activities in the period - contract revenue	95,251	68,225
Total revenues	$ 104,754	$ 69,056	$ 68,458