Leasing Arrangements - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Right-of-use assets, net:
Operating leases, gross	$ 24,560	$ 24,564
Accumulated reduction	(3,156)	(2,119)
Operating leases, net	21,404	22,445
Finance leases (included in “Other non-current assets”), gross	73	72
Accumulated depreciation	(31)	(21)
Finance leases (included in “Other non-current assets”), net	42	51
Total Right-of-use assets, net	21,446	22,496
Lease liabilities:
Current portion of Operating lease liability	2,481	2,290
Long-term Operating lease liability	20,753	22,021
Total Operating lease liability	23,234	24,311
Current portion of Finance lease (included in “Accrued expenses and other liabilities”) liability	21	20
Long-term Finance lease (included in “Pension obligations and other liabilities”) liability	24	34
Total Finance lease liability	45	54
Total Lease liabilities	23,279	24,365
Current portion of lease liability - Operating leases	132	2,290
Long-term lease liability - Operating leases	$ 269	$ 22,021
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent
Liabilities Subject To Compromise
Lease liabilities:
Current portion of lease liability - Operating leases	$ 2,300
Long-term lease liability - Operating leases	$ 20,500