Lease Obligations - Schedule of Lease Costs including Weighted Average Lease Terms and Weighted-average Discount Rates (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance cost:
Interest on lease liability (included in Interest expense, net)	$ 1,642
Short-term lease cost	44
Variable lease cost	309
Sublease income (included in Rentals, net)	(27,400)
Total lease cost	$ (21,885)
Operating lease, weighted average remaining lease term (in years)	41 years 6 months
Financelease, weighted average remaining lease term (in years)	4 years
Operating lease, weighted average discount rate, percent	4.90%
Finance lease, weighted average discount rate, percent	7.50%
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 3,044
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	302
Depreciation and Amortization [Member]
Finance cost:
Amortization of right-of-use asset (included in Depreciation and Amortization)	$ 174