Lease Obligations - Schedule of Lease Costs including Weighted Average Lease Terms and Weighted-average Discount Rates (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Finance cost:
Interest on lease liability (included in Interest expense, net)	$ 410	$ 1,231
Short-term lease cost	0	44
Variable lease cost	72	206
Sublease income (included in Rentals, net)	(6,858)	(20,392)
Total lease cost	$ (5,489)	$ (16,291)
Operating lease, weighted average remaining lease term (in years)	41 years 8 months 12 days	41 years 8 months 12 days
Financelease, weighted average remaining lease term (in years)	4 years 3 months 18 days	4 years 3 months 18 days
Operating lease, weighted average discount rate, percent	4.90%	4.90%
Finance lease, weighted average discount rate, percent	7.50%	7.50%
Operating expense [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 761	$ 2,283
General and administrative expense [Member]
Lessee, Lease, Description [Line Items]
Operating lease cost	80	208
Depreciation and Amortization [Member]
Finance cost:
Amortization of right-of-use asset (included in Depreciation and Amortization)	$ 46	$ 129