Leases - Position Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets [Abstract]
Right of use assets	$ 46,647
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Right of use assets
Lease Assets	$ 46,647
Liabilities, Current [Abstract]
Operating lease liability, current	$ 13,479
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating lease liability, current
Liabilities, Noncurrent [Abstract]
Operating lease liability, noncurrent	$ 33,396
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating lease liability, noncurrent
Lease liability	$ 46,875
Lease, Cost [Abstract]
Operating lease cost	16,154
Short-term lease cost	2,568
Variable lease cost	605
Total lease cost	19,327
Other Information [Abstract]
Operating cash flows for operating leases	16,154
Operating leases	$ 17,852
Lease Terms And Discount Rates [Abstract]
Weighted-average remaining lease term - operating leases	7 years 1 month 17 days
Weighted-average discount rate - operating leases	5.97%
Undiscounted Cash Flows
2020	$ 15,586
2021	10,344
2022	7,099
2023	4,816
2024	2,577
Thereafter	17,649
Total undiscounted lease liability	58,071
Less: amount of lease payments representing interest	(11,196)
Long-term lease obligations	46,875
Minimum rental commitments under non cancellable operating leases
2019			$ 10,701
2020			7,104
2021			3,774
2022			2,356
2023			1,538
Thereafter			7,482
Total minimum lease payments			$ 32,955
Accounting Standards Update 2016-02
Assets [Abstract]
Right of use assets		$ 42,800
Liabilities, Noncurrent [Abstract]
Lease liability		42,800
Undiscounted Cash Flows
Long-term lease obligations		$ 42,800
Adjustment | Accounting Standards Update 2016-02
Assets [Abstract]
Right of use assets	42,800
Liabilities, Noncurrent [Abstract]
Lease liability	42,800
Undiscounted Cash Flows
Long-term lease obligations	$ 42,800