Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Rent and related expense	$ 18,400	$ 16,800
Accumulated depreciation and amortization	112,468		$ 120,434
Assets Held under Capital Leases
Lessee, Lease, Description [Line Items]
Machinery, furniture and equipment	1,800		300
Accumulated depreciation and amortization	$ 1,700		$ 100