Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Intangible assets
Gross Carrying Amount	$ 109,215		$ 109,215		$ 109,215
Accumulated Amortization	(46,221)		(46,221)		(39,386)
Amortization expense of intangible assets	2,200	$ 2,900	6,800	$ 8,600
Estimated future amortization expense for intangible assets
2020 (remaining six months)	1,982		1,982
2021	7,577		7,577
2022	6,416		6,416
2023	5,581		5,581
2024	4,862		4,862
Thereafter	36,576		36,576
Total	62,994		62,994		69,829
Tradename
Intangible assets
Gross Carrying Amount	16,040		16,040		16,040
Accumulated Amortization	(14,565)		(14,565)		(13,216)
Estimated future amortization expense for intangible assets
Total	1,475		1,475		2,824
Customer relationships
Intangible assets
Gross Carrying Amount	91,000		91,000		91,000
Accumulated Amortization	(29,674)		(29,674)		(24,353)
Estimated future amortization expense for intangible assets
Total	61,326		61,326		66,647
Non-compete agreements
Intangible assets
Gross Carrying Amount	1,900		1,900		1,900
Accumulated Amortization	(1,707)		(1,707)		(1,580)
Estimated future amortization expense for intangible assets
Total	193		193		320
Other
Intangible assets
Gross Carrying Amount	275		275		275
Accumulated Amortization	$ (275)		$ (275)		(237)
Estimated future amortization expense for intangible assets
Total					$ 38