COMMITMENTS, CONTINGENCIES AND LITIGATION (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of credit agreements

	December 31,
	2013			2012
Credit limit:
Revolving credit facility	$	50,000		$	70,000
Term loan		300,000			67,300
Outstanding balance on revolving credit facility		—			30,501
Outstanding principal balance on the term loan, less unamortized discount of $9.4 million and $0.6 million, respectively		290,608			64,873
Letters of credit issued with proceeds from revolving credit facility		—			13,578
Letters of credit issued with cash		6,400			—
Borrowing capacity		50,000			25,921
Interest rate – term loan		6.0	%		3.7	%
Interest rate – revolving credit facility		5.0	%		3.7	%

Schedule of maturities of long-term debt

2014	$	3,000
2015		3,000
2016		3,000
2017		3,000
2018		3,000
2019		285,000
	$	300,000

Schedule of future minimum capital lease payments and the present value of the minimum lease payments for all capital leases

2014	$	10,336
2015		12,912
2016		9,464
2017		8,978
2018		9,183
Thereafter		29,197
Remaining capital lease payments		80,070
Less: amounts representing imputed interest		(24,781	)
Present value of minimum lease payments		55,289
Less: current portion		(5,489	)
	$	49,800

Schedule of future minimum rental payments for operating leases

2014	$	29,161
2015		21,384
2016		21,426
2017		15,957
2018		15,642
Thereafter		26,814
	$	130,384

Schedule of future minimum payments under service commitments

2014	$	18,049
2015		15,987
2016		3,812
2017		390
2018		198
Thereafter		231
	$	38,667