Leases - Lessee Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	15 years
Operating lease, right-of-use asset	$ 20,232
Present value of lease liabilities	21,358
Lessee, operating lease, lease not yet commenced, commitment amount	2,600
Operating lease, payments	$ 5,900
Operating leases, rent expense		$ 5,800	$ 5,200
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset				$ 23,800
Accrued rent				1,100
Present value of lease liabilities				$ 24,900
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	4 months
Lessee, operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	8 years
Lessee, operating lease, term of contract	5 years