Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) option	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Options for renewal | option	1
Assets and Liabilities, Lessee [Abstract]
Total right-of-use assets - net	$ 94,028		$ 82,374
Current lease liabilities	16,117		15,235
Noncurrent lease liabilities	80,802		69,928
Total lease liabilities	96,919		85,163
Lease, Cost [Abstract]
Operating lease cost	6,328	$ 5,375
Variable lease cost	641	593
Total lease expense	6,969	5,968
Cash paid for amounts included in the measurement of operating lease liabilities	6,038	5,539
Right-of-use assets obtained in exchange for new operating lease liabilities	17,024	$ 1,809
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020 (excluding the three months ended March 31, 2020)	14,121
2021	16,206
2022	13,201
2023	10,812
2024	8,773
Thereafter	54,945
Total lease payments	118,058
Less: Imputed interest	(21,139)		(19,218)
Legally binding minimum lease payments for leases signed but not yet commenced	6,400
Maturity of Lease Liabilities
2020			18,449
2021			15,070
2022			10,647
2023			8,894
2024			7,037
Thereafter			44,284
Total lease payments			104,381
Building
Assets and Liabilities, Lessee [Abstract]
Total right-of-use assets - net	88,156		75,381
Equipment
Assets and Liabilities, Lessee [Abstract]
Total right-of-use assets - net	$ 5,872		$ 6,993
Building and Equipment
Lease, Cost [Abstract]
Weighted-average remaining lease term (years): Operating leases	9 years 10 months 2 days		9 years 7 months 9 days
Weighted-average discount rate: Operating leases	3.75%		4.08%
Vehicles
Lease, Cost [Abstract]
Weighted-average remaining lease term (years): Operating leases	1 year 11 months 1 day		1 year 11 months 1 day
Weighted-average discount rate: Operating leases	2.93%		2.99%