LONG-TERM DEBT / INTEREST EXPENSE (Details) (USD $)	12 Months Ended							12 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended					3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	12 Months Ended						3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended					12 Months Ended							12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010 Senior credit facility	Dec. 31, 2013 Senior credit facility	Dec. 31, 2012 Senior credit facility	Aug. 01, 2012 Senior credit facility	Dec. 31, 2010 Senior credit facility Federal funds effective rate	Dec. 31, 2010 Senior credit facility Adjusted LIBOR	Aug. 01, 2012 Term Loan Facility	Oct. 31, 2012 Term Loan Facility	Dec. 31, 2013 Term Loan Facility	Dec. 31, 2013 Term Loan Facility	Dec. 31, 2012 Term Loan Facility	Dec. 31, 2011 Term Loan Facility	Mar. 31, 2011 Term Loan Facility	Dec. 31, 2010 Term Loan Facility Adjusted LIBOR	Dec. 31, 2013 Term Loan Facility Option One	Sep. 30, 2013 Term Loan Facility Option One	Dec. 31, 2013 Term Loan Facility Option One Fixed rate	Sep. 30, 2013 Term Loan Facility Option One Fixed rate	Dec. 31, 2013 Term Loan Facility Option Two	Sep. 30, 2013 Term Loan Facility Option Two	Dec. 31, 2013 Term Loan Facility Option Two Fixed rate	Dec. 31, 2013 Term Loan Facility Option Two Fixed rate	Dec. 31, 2013 Revolving Credit Facility	Dec. 31, 2012 Revolving Credit Facility	Dec. 31, 2011 Revolving Credit Facility	Mar. 31, 2011 Revolving Credit Facility	Dec. 31, 2010 Revolving Credit Facility Adjusted LIBOR	Dec. 31, 2013 Revolving Credit Facility Option One	Sep. 30, 2013 Revolving Credit Facility Option One	Dec. 31, 2013 Revolving Credit Facility Option One Fixed rate	Dec. 31, 2013 Revolving Credit Facility Option Two	Sep. 30, 2013 Revolving Credit Facility Option Two	Dec. 31, 2013 Revolving Credit Facility Option Two Fixed rate	Dec. 31, 2013 Letter of credit	Dec. 31, 2012 Letter of credit	Dec. 31, 2013 Other	Dec. 31, 2012 Other	Dec. 31, 2013 Mortgage and other interest expense	Dec. 31, 2012 Mortgage and other interest expense	Dec. 31, 2011 Mortgage and other interest expense	Dec. 31, 2011 Senior Notes	Dec. 31, 2011 Senior Subordinated Notes	Dec. 31, 2013 Repricing to the senior credit facility	Dec. 31, 2012 Repricing to the senior credit facility	Dec. 31, 2013 Repricing to the senior credit facility Option One	Dec. 31, 2013 Repricing to the senior credit facility Option One Federal funds effective rate	Dec. 31, 2013 Repricing to the senior credit facility Option One One month adjusted LIBOR	Dec. 31, 2013 Repricing to the senior credit facility Option Two Adjusted LIBOR
Long-term Debt
Total Debt	$ 1,347,099,000	$ 1,098,562,000			$ 1,350,000,000	$ 1,096,112,000																																	$ 1,112,000	$ 2,450,000
Less: current maturities	(5,443,000)	(3,817,000)
Long-term debt	1,341,656,000	1,094,745,000
Total debt principal maturities
2014	5,443,000				4,550,000																																		893,000
2015	4,769,000				4,550,000																																		219,000
2016	4,550,000				4,550,000
2017	4,550,000				4,550,000
2018	4,550,000				4,550,000
2019	1,327,250,000				1,327,250,000
Total Debt	1,347,099,000	1,098,562,000			1,350,000,000	1,096,112,000																																	1,112,000	2,450,000
Original issue discount					4,000,000
Interest expense													42,020,000	41,216,000	38,356,000											680,000	533,000	598,000													159,000	168,000	766,000	4,808,000	3,055,000
Early extinguishment of debt	5,712,000	1,343,000	19,855,000
Deferred financing fees amortization	2,507,000	2,439,000	2,756,000
OID amortization	2,625,000	404,000	344,000
Interest income	(254,000)	(28,000)	(1,110,000)
Termination of interest rate swaps			5,819,000
Interest expense, net	53,029,000	47,556,000	74,903,000
Revolving Credit Facility pledged to secure letters of credit																										1,100,000
Increase in outstanding balance										200,000,000
Increase in outstanding borrowings										200,000,000		252,500,000	252,500,000
Maximum borrowing capacity																1,200,000,000										130,000,000			80,000,000
Basis of interest rate (as a percent)				Prime Rate				Federal funds effective rate	Adjusted LIBOR		LIBOR		LIBOR																																			Prime Rate	Federal funds effective rate	One month adjusted LIBOR	Adjusted LIBOR
Interest rate margin (as a percent)											2.75%	2.75%	2.75%				2.25%													2.00%																			0.50%	1.00%
Fixed interest rate base (as a percent)																				1.75%	2.00%			0.75%	1.00%								2.25%			1.25%
Additional interest margin added to fixed and variable rates (as a percent)																		1.50%	1.75%			2.50%	2.75%								1.25%	2.00%		2.25%	3.00%
Increase in cash dividends to parent							50,000,000
Basket used to make dividends to parent																																														$ 75,000,000
Current interest rate (as a percent)																																														3.25%	3.75%
Fee for letters of credit to lenders (as a percent)																																					2.50%	3.00%
Commitment fee respect of unutilized revolving loan commitments (as a percent)																										0.50%	0.50%