Intangible Assets - Changes in Goodwill, Customer Relationships and Trademarks (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 120,343
Amortization	0
Balance at end of period	120,343
Finite-lived Intangible Assets [Roll Forward]
Balance at end of period	15,757
Customer Relationships— Acquired
Finite-lived Intangible Assets [Roll Forward]
Balance at beginning of period	14,513
Adjustments	0
Amortization	(4,540)
Balance at end of period	9,973
Customer Relationships— Other
Finite-lived Intangible Assets [Roll Forward]
Balance at beginning of period	3,255
Adjustments	(28)
Amortization	(1,486)
Balance at end of period	1,741
Trademarks
Finite-lived Intangible Assets [Roll Forward]
Balance at beginning of period	4,598
Adjustments	0
Amortization	(555)
Balance at end of period	$ 4,043