Right-of-Use ("ROU") Assets and Lease Liabilities - Operating and Finance Lease Liability (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) renewal_option	Dec. 31, 2019 USD ($)
Leases [Abstract]
Number of renewal options | renewal_option	1
Operating leases:
Right-of-use asset	$ 126,290	$ 120,562
Operating lease liability	126,286	120,068
Finance leases included in property and equipment, net:
Vehicle and equipment ROU assets, gross	9,219	9,204
Accumulated depreciation	(3,890)	(2,562)
Total finance ROU assets, net	5,329	6,642
Total finance lease liabilities	6,089	7,384
Real Estate
Operating leases:
Operating lease, right-of-use asset, gross	146,763	130,746
Accumulated amortization	(36,910)	(24,743)
Right-of-use asset	109,853	106,003
Operating lease liability	109,934	105,559
Vehicles and equipment
Operating leases:
Operating lease, right-of-use asset, gross	21,155	17,416
Accumulated amortization	(4,718)	(2,857)
Right-of-use asset	16,437	14,559
Operating lease liability	16,352	14,509
United States
Operating leases:
Right-of-use asset	111,634	104,938
Operating lease liability	111,486	104,356
Finance leases included in property and equipment, net:
Vehicle and equipment ROU assets, gross	6,471	6,341
Accumulated depreciation	(2,951)	(1,892)
Total finance ROU assets, net	3,520	4,449
Total finance lease liabilities	3,882	4,777
United States | Real Estate
Operating leases:
Operating lease, right-of-use asset, gross	129,390	114,202
Accumulated amortization	(32,063)	(21,337)
Right-of-use asset	97,327	92,865
Operating lease liability	97,251	92,319
United States | Vehicles and equipment
Operating leases:
Operating lease, right-of-use asset, gross	18,561	14,665
Accumulated amortization	(4,254)	(2,592)
Right-of-use asset	14,307	12,073
Operating lease liability	14,235	12,037
Canada
Operating leases:
Right-of-use asset	14,656	15,624
Operating lease liability	14,800	15,712
Finance leases included in property and equipment, net:
Vehicle and equipment ROU assets, gross	2,748	2,863
Accumulated depreciation	(939)	(670)
Total finance ROU assets, net	1,809	2,193
Total finance lease liabilities	2,207	2,607
Canada | Real Estate
Operating leases:
Operating lease, right-of-use asset, gross	17,373	16,544
Accumulated amortization	(4,847)	(3,406)
Right-of-use asset	12,526	13,138
Operating lease liability	12,683	13,240
Canada | Vehicles and equipment
Operating leases:
Operating lease, right-of-use asset, gross	2,594	2,751
Accumulated amortization	(464)	(265)
Right-of-use asset	2,130	2,486
Operating lease liability	$ 2,117	$ 2,472