Leases - Supplemental Balance Sheets Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 20,398	$ 21,056	$ 20,459
Property, plant and equipment, net	6,042	6,412
Lease right-of-use assets	26,440	27,468
Current operating lease liabilities	3,864	3,750	3,431
Current portion of long-term debt	2,376	2,424
Long-term operating lease liabilities	17,499	18,247	$ 17,823
Long-term debt	3,853	4,161
Total lease liabilities	27,592	28,582
Operating lease, accumulated amortization	9,100	8,500
Finance lease, accumulated amortization	$ 5,300	$ 4,700