Leases - Cash Flows (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,600
Right-of-use assets obtained in exchange for lease obligations:
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 136
Weighted average remaining lease term (in years)
Weighted average remaining lease term, Operating leases	7 years 4 months 24 days
Weighted average discount rate
Weighted average discount rate, Operating leases	6.40%