Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	6 years
Operating Lease, Weighted Average Discount Rate, Percent	4.50%
Right-of-use leased assets	$ 56,886	$ 0		$ 50,800
Operating Lease, Liability, Current	15,143
Operating lease liabilities, net of current	58,863	0
Operating Lease, Liability	74,006			$ 63,700
Landlord funded tenant improvements	12,397
Deferred Rent Credit, Noncurrent	4,723
Rental expense	15,900	$ 15,400	$ 15,400
Operating Lease, Payments	17,100
Operating leases minimum payments due [Abstract]
2019	18,087
2020	15,611
2021	14,206
2022	11,682
2023	8,952
Thereafter	15,758
Total minimum lease payments	84,296
Lessor, Operating Lease, Lease Not yet Commenced, Assumption and Judgment, Value of Underlying Asset, Amount	16,100
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ 10,290
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	4 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	8 years