Leases - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018
Lessee, Lease, Description [Line Items]
Initial recognition of operating lease right-of-use assets	$ 18,282,000			$ 18,700,000
Operating lease liabilities	$ 19,814,000			20,200,000
Cumulative adjustment for adoption				125,000	$ 0
Operating lease, weighted average remaining lease term	10 years 3 months 25 days
Lessee, operating lease, discount rate	3.51%
Operating lease, lease not yet commenced,	$ 0
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Rent expense		$ 3,000,000.0	$ 3,100,000
Related Parties Lease Transaction
Lessee, Lease, Description [Line Items]
Sale leaseback transaction	$ 0
Retained Earnings (Accumulated Deficit)
Lessee, Lease, Description [Line Items]
Cumulative adjustment for adoption				125,000	$ 2,043,000
Retained Earnings (Accumulated Deficit) | Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Cumulative adjustment for adoption				$ 125,000