Leasing Arrangements - 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 from operating leases	$ 2,379	$ 2,363
Operating cash flows from finance leases	1	8
Financing cash flows from finance leases	10	338
Right-of-use assets, net obtained in exchange for new lease obligations:
Operating leases	110	23,695
Finance leases	$ 0	$ 71