Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows paid for operating leases	$ 2,734	$ 2,444
Operating cash flows paid for interest portion of finance leases	25	21
Financing cash flows paid for principal portion of finance leases	96	61
Right-of-use assets obtained in exchange for lease obligations
Operating leases	299	280
Finance leases	$ 0	$ 517