Goodwill and Intangible Assets, Net - Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 403,034	$ 412,514
Accumulated Amortization	111,407	104,055
Total future amortization of intangible assets	291,627	308,459
Amortization of intangible assets	$ 9,300	$ 9,100
Corporate trade name
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life	13 years 10 months 24 days	14 years 2 months 12 days
Gross Carrying Amount	$ 23,300	$ 23,300
Accumulated Amortization	5,236	4,891
Total future amortization of intangible assets	$ 18,064	$ 18,409
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life	19 years 8 months 12 days	16 years 9 months 18 days
Gross Carrying Amount	$ 281,219	$ 291,519
Accumulated Amortization	47,354	44,750
Total future amortization of intangible assets	$ 233,865	$ 246,769
Technology
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life	1 year 8 months 12 days	2 years
Gross Carrying Amount	$ 82,922	$ 82,922
Accumulated Amortization	54,259	49,760
Total future amortization of intangible assets	$ 28,663	$ 33,162
Below market lease, net
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life	3 years 8 months 12 days	2 years 2 months 12 days
Gross Carrying Amount	$ 1,118	$ 2,048
Accumulated Amortization	498	1,334
Total future amortization of intangible assets	$ 620	$ 714
Provider network contracts
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life	3 years 6 months	3 years 8 months 12 days
Gross Carrying Amount	$ 14,475	$ 12,725
Accumulated Amortization	4,060	3,320
Total future amortization of intangible assets	$ 10,415	$ 9,405