GUARANTOR - Condensed Income Statement (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
NET REVENUES	$ 246,614,000	$ 122,299,000	$ 124,970,000	$ 99,001,000	$ 124,550,000	$ 121,641,000	$ 121,571,000	$ 97,009,000	$ 118,614,000	$ 115,536,000	$ 101,322,000	$ 79,009,000	$ 592,884,000	$ 464,771,000	$ 414,481,000
Operating Expenses Abstract
Depreciation Depletion And Amortization													15,546,000	9,793,000	8,419,000	$ 8,419,000
General and Administrative Expense													47,859,000	33,328,000	26,479,000
RestructuringChargesAndTransitionServices													16,922,000	0	2,858,000
Asset Impairment Charges													952,000	254,000	0
Acquisition Costs													41,313,000	708,000	3,978,000
OtherCostAndExpenseOperating													2,213,000	565,000	0
Net (gain) loss on sale or disposal of assets													11,853,000	(1,621,000)	(2,364,000)
Operating Expenses													580,300,000	366,714,000	328,899,000
Operating Income Loss	(2,265,000)	13,485,000	16,379,000	(15,016,000)	30,040,000	25,688,000	27,584,000	14,745,000					12,584,000	98,057,000	85,582,000
Other income													0	(2,299,000)	0	0
TOTAL OTHER (INCOME) EXPENSE													4,135,000	8,559,000	0
INCOME (LOSS) BEFORE INCOME TAXES (BENEFIT)													(24,072,000)	52,859,000	47,621,000
Income Tax Expense (Benefit)													(257,085,000)	14,794,000	18,437,000
INCOME (LOSS) FROM CONTINUING OPERATIONS	231,829,000	4,100,000	6,414,000	(9,331,000)	11,399,000	11,420,000	10,834,000	4,412,000					233,013,000	38,065,000	29,184,000
Preferred stock dividend	252,000	663,000	550,000	550,000	550,000	526,000	412,000	413,000					2,015,000	1,901,000	752,000
Income Loss From Discontinued Operations Net Of Tax	836,000	0	0	0	0	0	0	0					836,000	0	0
NET INCOME (LOSS) AVAILABLE TO COMMON SHAREHOLDERS	231,577,000	3,437,000	5,864,000	(9,881,000)	10,849,000	10,894,000	10,422,000	3,999,000					230,998,000	36,164,000	28,432,000
NET INCOME (LOSS)	$ 232,413,000	$ 3,437,000	$ 5,864,000	$ (9,881,000)	$ 10,849,000	$ 10,894,000	$ 10,422,000	$ 3,999,000					233,849,000	38,065,000	29,184,000	$ 29,184,000
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
NET REVENUES													(88,000)	2,131,000	1,536,000
Operating Expenses Abstract
Depreciation Depletion And Amortization													1,793,000	1,235,000	1,123,000
General and Administrative Expense													47,787,000	33,218,000	26,395,000
RestructuringChargesAndTransitionServices													11,314,000	0	2,858,000
Asset Impairment Charges													511,000	0	0
Acquisition Costs													41,313,000	708,000	3,978,000
OtherCostAndExpenseOperating													(117,000)	565,000	0
Net (gain) loss on sale or disposal of assets													601,000	601,000	601,000
Operating Expenses													102,000,000	35,125,000	33,753,000
Operating Income Loss													(102,088,000)	(32,994,000)	(32,217,000)
Net interest expense, including amortization of deferred financing expense													43,000	24,000	0
Other income													0	(100,000)	0
Income from equity investment in subsidiaries													(78,895,000)	(85,977,000)	(79,838,000)
TOTAL OTHER (INCOME) EXPENSE													(78,852,000)	(85,853,000)	(79,838,000)
INCOME (LOSS) BEFORE INCOME TAXES (BENEFIT)													(23,236,000)	52,859,000	47,621,000
Income Tax Expense (Benefit)													(257,085,000)	14,794,000	18,437,000
INCOME (LOSS) FROM CONTINUING OPERATIONS													233,849,000	38,065,000	29,184,000
Preferred stock dividend													(2,015,000)	(1,901,000)	(752,000)
Income Loss From Discontinued Operations Net Of Tax													0	0	0
NET INCOME (LOSS) AVAILABLE TO COMMON SHAREHOLDERS													231,834,000	36,164,000	28,432,000
NET INCOME (LOSS)													$ 233,849,000	$ 38,065,000	$ 29,184,000