Business Combinations - Rollforward of Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Noncontrolling interest at beginning of period			$ 24,795
Net income attributable to noncontrolling interest	$ 488	$ 435	1,031	$ 544
Noncontrolling interest at end of period	23,764		23,764
VIE, Primary Beneficiary
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Noncontrolling interest at beginning of period			6,705
Net income attributable to noncontrolling interest			160
Noncontrolling interest at end of period	$ 6,865		$ 6,865