Leasing Arrangements - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Right-of-use assets, net:
Operating leases, gross	$ 24,570	$ 24,564
Accumulated reduction	(2,588)	(2,119)
Operating leases, net	21,982	22,445	$ 22,445
Finance leases (included in “Other non-current assets”), gross	72	72
Accumulated depreciation	(26)	(21)
Finance leases (included in “Other non-current assets”), net	46		51
Total Right-of-use assets, net	22,028		22,496
Lease liabilities:
Current portion of Operating lease liability	2,401	2,290
Long-term Operating lease liability	21,427	22,021
Total Operating lease liability	23,828		24,311
Current portion of Finance lease (included in “Accrued expenses and other liabilities”) liability	20	20
Long-term Finance lease (included in “Pension obligations and other liabilities”) liability	29	$ 34
Total Finance lease liability	49		54
Total Lease liabilities	$ 23,877		$ 24,365