DEBT (Details)			3 Months Ended
	Aug. 28, 2015 USD ($)	Jun. 15, 2011 USD ($) $ / shares	Mar. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Jul. 02, 2015 $ / shares	Jun. 10, 2015 convertible_debt_instrument
2016 Notes:
Carrying amount of liability			$ 220,626,000	$ 218,240,000
Revolving Credit Facility
2016 Notes:
Line of credit facility outstanding			$ 165,000,000	$ 150,000,000
Weighted average interest rate on debt			2.00%	1.90%
Available borrowings under senior secured revolving credit facility			$ 585,000,000
Line of credit facility, fair value of amount outstanding			157,300,000
Term Loan
2016 Notes:
Line of credit facility outstanding			$ 344,400,000	$ 346,200,000
Weighted average interest rate on debt			2.00%	1.80%
Long-term debt, fair value			$ 330,100,000
Convertible Debt
2016 Notes:
Deferred finance costs, gross			200,000	$ 500,000
Principal amount outstanding		$ 230,000,000	227,096,000	227,100,000
Interest rate on debt		1.625%
Portion of the debt proceeds that was classified as equity at the time of the offering		$ 43,200,000
Effective interest rate implicit in the liability component		5.60%
Carrying amount of liability			220,600,000	218,200,000
Unamortized discount			6,200,000	8,400,000
Fair value of outstanding borrowings			295,900,000
Common stock based on initial conversion rate ratio (in shares)		18.9287
Principal amount to be considered for conversion purpose		$ 1,000
Initial conversion price, per share | $ / shares		$ 52.83
Maximum selling price of company's common stock		150.00%
Principal amount of notes per average trading price		$ 1,000
Maximum average conversion value of the Notes		98.00%
Number debt instruments pending conversion | convertible_debt_instrument						2,903
Repayments of debt			$ 2,900,000
Stock issued during period, shares, conversion of convertible securities | shares			8,457
Strike price of the call transaction (in dollars per share) | $ / shares					$ 52.83
Strike price of warrant transactions (in dollars per share) | $ / shares					$ 64.43
August 2015 Amendment
2016 Notes:
Senior credit facility, maximum borrowing capacity	$ 1,100,000,000
Cash balance threshold above which excess amount is not subject to any restriction of use or investment	$ 40,000,000
August 2015 Amendment | Minimum
2016 Notes:
Line of credit, commitment fee percentage	0.15%
August 2015 Amendment | Maximum
2016 Notes:
Line of credit, commitment fee percentage	0.30%
August 2015 Amendment | Revolving Credit Facility
2016 Notes:
Senior credit facility, maximum borrowing capacity	$ 750,000,000
August 2015 Amendment | Standby Letters of Credit
2016 Notes:
Senior credit facility, maximum borrowing capacity	60,000,000
August 2015 Amendment | Swingline Loan
2016 Notes:
Senior credit facility, maximum borrowing capacity	$ 60,000,000
August 2015 Amendment | Eurodollar | Minimum
2016 Notes:
Interest rates available to the Company at its option	1.00%
August 2015 Amendment | Eurodollar | Maximum
2016 Notes:
Interest rates available to the Company at its option	1.75%
August 2015 Amendment | Federal Funds
2016 Notes:
Interest rates available to the Company at its option	0.50%
August 2015 Amendment | (LIBOR)
2016 Notes:
Interest rates available to the Company at its option	1.00%
August 2015 Amendment | Term Loan
2016 Notes:
Senior credit facility, maximum borrowing capacity	$ 350,000,000
August 2015 Amendment | Term Loan | Maximum
2016 Notes:
Proceeds from lines of credit	$ 200,000,000
July 2014 Amendment
2016 Notes:
Deferred finance costs, gross				$ 1,400,000