Guarantor/Non Guarantor Condensed Consolidating Financial Statements (Cash Flows)) (Details) - USD ($) $ in Thousands	1 Months Ended	5 Months Ended	6 Months Ended
Jun. 30, 2020	May 31, 2020	Jun. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 4,717	$ (2,245)	$ 4,046
Cash flows from investing activities:
Purchases of property and equipment	(900)	(10,848)	(31,382)
Proceeds from sale of property and equipment	752	1,665	3,439
Proceeds from insurance recoveries	0	22	588
Net cash provided by (used in) investing activities	(148)	(9,161)	(27,355)
Cash flows from financing activities:
Debt repayments	0	(175,000)	0
Proceeds from debt issuance	0	195,187	0
Proceeds from DIP Facility	0	4,000	0
Repayment of DIP Facility	0	(4,000)	0
Payments of debt issuance costs	0	(7,625)	0
Purchase of treasury stock	0	(8)	(125)
Intercompany contributions/distributions	0	0	0
Net cash provided by (used in) financing activities	0	12,554	(125)
Net increase (decrease) in cash, cash equivalents and restricted cash	4,569	1,148	(23,434)
Beginning cash, cash equivalents, and restricted cash	26,765	25,617	54,564
Ending cash, cash equivalents, and restricted cash	31,334	26,765	31,130
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	0	0	0
Cash flows from investing activities:
Purchases of property and equipment	0	0	0
Proceeds from sale of property and equipment	0	(154)	0
Proceeds from insurance recoveries		0	0
Net cash provided by (used in) investing activities	0	(154)	0
Cash flows from financing activities:
Debt repayments		0
Proceeds from debt issuance		0
Proceeds from DIP Facility		0
Repayment of DIP Facility		0
Payments of debt issuance costs		0
Purchase of treasury stock		0	0
Intercompany contributions/distributions	0	154	0
Net cash provided by (used in) financing activities	0	154	0
Net increase (decrease) in cash, cash equivalents and restricted cash	0	0	0
Beginning cash, cash equivalents, and restricted cash	0	0	0
Ending cash, cash equivalents, and restricted cash	0	0	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	10,312	132,354	35,209
Cash flows from investing activities:
Purchases of property and equipment	(809)	(8,755)	(28,634)
Proceeds from sale of property and equipment	752	1,819	3,376
Proceeds from insurance recoveries		22	588
Net cash provided by (used in) investing activities	(57)	(6,914)	(24,670)
Cash flows from financing activities:
Debt repayments		0
Proceeds from debt issuance		0
Proceeds from DIP Facility		0
Repayment of DIP Facility		0
Payments of debt issuance costs		0
Purchase of treasury stock		0	0
Intercompany contributions/distributions	(10,255)	(125,440)	(10,539)
Net cash provided by (used in) financing activities	(10,255)	(125,440)	(10,539)
Net increase (decrease) in cash, cash equivalents and restricted cash	0	0	0
Beginning cash, cash equivalents, and restricted cash	0	0	0
Ending cash, cash equivalents, and restricted cash	0	0	0
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(979)	(6,839)	3,941
Cash flows from investing activities:
Purchases of property and equipment	(77)	(1,524)	(2,434)
Proceeds from sale of property and equipment	0	0	63
Proceeds from insurance recoveries		0	0
Net cash provided by (used in) investing activities	(77)	(1,524)	(2,371)
Cash flows from financing activities:
Debt repayments		0
Proceeds from debt issuance		0
Proceeds from DIP Facility		0
Repayment of DIP Facility		0
Payments of debt issuance costs		0
Purchase of treasury stock		0	0
Intercompany contributions/distributions	(6,475)	8,363	(245)
Net cash provided by (used in) financing activities	(6,475)	8,363	(245)
Net increase (decrease) in cash, cash equivalents and restricted cash	(7,531)	0	1,325
Beginning cash, cash equivalents, and restricted cash	10,158	10,158	3,216
Ending cash, cash equivalents, and restricted cash	2,627	10,158	4,541
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(4,616)	(127,760)	(35,104)
Cash flows from investing activities:
Purchases of property and equipment	(14)	(569)	(314)
Proceeds from sale of property and equipment	0	0	0
Proceeds from insurance recoveries		0	0
Net cash provided by (used in) investing activities	(14)	(569)	(314)
Cash flows from financing activities:
Debt repayments		(175,000)
Proceeds from debt issuance		195,187
Proceeds from DIP Facility		4,000
Repayment of DIP Facility		(4,000)
Payments of debt issuance costs		(7,625)
Purchase of treasury stock		(8)	(125)
Intercompany contributions/distributions	16,730	116,923	10,784
Net cash provided by (used in) financing activities	16,730	129,477	10,659
Net increase (decrease) in cash, cash equivalents and restricted cash	12,100	1,148	(24,759)
Beginning cash, cash equivalents, and restricted cash	16,607	15,459	51,348
Ending cash, cash equivalents, and restricted cash	$ 28,707	$ 16,607	$ 26,589

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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