Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, plant, and equipment:
Property, plant, and equipment – gross	$ 2,829,620	$ 2,810,623
Accumulated depreciation and depletion	(1,044,371)	(1,010,903)
Property, plant, and equipment – net	1,785,249	1,799,720
Capitalized leases:
Capitalized leases – gross	80,659	76,216
Accumulated depreciation	(44,181)	(41,051)
Capitalized leases – net	36,478	35,165
Cash and cash equivalents	153,200	48,873
Restricted cash	37,575	21,090
Accounts receivable – net of allowance of $5,505 and $5,309 at June 30, 2018 and December 31, 2017, respectively	182,517	200,006
Identifiable intangible assets – net	25,839	26,645
Goodwill	186,890	188,169
Investments in partially owned entities	16,289	15,942
Other assets	51,438	59,287
Total assets	2,475,475	2,394,897
Liabilities:
Borrowings under revolving line of credit	0	0
Accounts payable and accrued expenses	224,749	241,259
Construction loan - net of deferred financing costs of $179 at December 31, 2017	0	19,492
Mortgage notes and term loans - net of unamortized discount and deferred financing costs of $14,704 and $31,997, in the aggregate, at June 30, 2018 and December 31, 2017, respectively	1,385,682	1,721,958
Sale-leaseback financing obligations	120,289	121,516
Capitalized lease obligations	38,890	38,124
Unearned revenue	20,145	18,848
Pension and postretirement benefits	15,392	16,756
Deferred tax liability - net	18,474	21,940
Multi-Employer pension plan withdrawal liability	9,037	9,134
Total liabilities	1,832,658	2,209,027
Commitments and Contingencies (Note 13)
Preferred shares of beneficial interest, $0.01 par value – authorized 375,000 Series B Cumulative Convertible Voting and Participating Preferred Shares; aggregate liquidation preference of $375,000; zero and 375,000 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	0	372,794
Shareholders’ equity (deficit):
Preferred shares of beneficial interest, $0.01 par value – authorized 1,000 Series A Cumulative Non-Voting Preferred Shares; aggregate liquidation preference of $125; zero and 125 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	0	0
Common shares of beneficial interest, $0.01 par value – authorized 250,000,000 shares; 143,459,052 and 69,370,609 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	1,435	694
Paid-in capital	1,257,779	394,082
Accumulated deficit and distributions in excess of net earnings	(611,208)	(581,470)
Accumulated other comprehensive loss	(5,189)	(230)
Total shareholders’ equity (deficit)	642,817	(186,924)
Total liabilities, Series B Preferred Shares and shareholders’ equity (deficit)	2,475,475	2,394,897
Land
Property, plant, and equipment:
Property, plant, and equipment – gross	385,713	389,443
Buildings and improvements
Property, plant, and equipment:
Property, plant, and equipment – gross	1,894,824	1,865,727
Capitalized leases:
Capitalized leases – gross	16,827	16,827
Machinery and equipment
Property, plant, and equipment:
Property, plant, and equipment – gross	549,083	555,453
Capitalized leases:
Capitalized leases – gross	$ 63,832	$ 59,389