Lease Commitments - Supplemental Balance Sheet and Cash Flow Information Related to Operating Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 26,165
Operating lease liabilities	30,098
Cash paid for amounts included in the measurement of operating lease liabilities	5,936
Right-of-use assets obtained in exchange for new operating lease obligations	$ 1,224
Weighted average remaining lease term for operating leases	8 years 6 months
Weighted average discount rate for operating leases	4.70%