LONG-TERM DEBT OBLIGATIONS, Term Loan and Revolving Credit Facility Narrative (Details) (USD $)	0 Months Ended	3 Months Ended	22 Months Ended				0 Months Ended											0 Months Ended				0 Months Ended		0 Months Ended							0 Months Ended
	Jun. 25, 2012	Mar. 31, 2014	Oct. 17, 2013	Dec. 31, 2013	Mar. 31, 2014 4.00% Convertible Senior Notes	Dec. 31, 2013 4.00% Convertible Senior Notes	Oct. 17, 2013 Base Rate [Member]	Oct. 17, 2013 Base Rate [Member] Minimum [Member]	Oct. 17, 2013 Base Rate [Member] Maximum [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Debt Instrument, Redemption, Period One [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Debt Instrument, Redemption, Period Two [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Debt Instrument, Redemption, Period Three [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Debt Instrument, Redemption, Period Four [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Oct. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]	Jun. 25, 2012 Term Loan and Revolving Credit Facility [Member]	Jun. 25, 2012 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Oct. 17, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Oct. 17, 2013 Revolving Credit Facility [Member]	Jun. 25, 2012 Revolving Credit Facility [Member]	Jun. 25, 2012 Refinanced Term Loan [Member]	Oct. 17, 2013 Refinanced Term Loan [Member]	Jun. 25, 2012 Senior Secured Credit Facility [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Interest Period Option 1 [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Interest Period Option 2 [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Minimum [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Maximum [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Federal Funds Rate [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt term																		5 years				5 years
Face amount																	$ 100,000,000.0	$ 85,000,000.0				$ 10,000,000.0			$ 38,000,000.0
Original revolving credit facility																							15,000,000.0
Debt outstanding																				38,000,000	85,000,000	10,000,000
Interest rate during period			6.50%
Basis spread on variable rate							2.75%	2.50%	2.75%	3.75%					3.50%	3.75%															0.50%	1.00%
Number of days in a year used to calculate rate																													365 days	366 days		360 days
Sum of LIBOR interest period																																1 month
Sum of LIBOR interest period advance determination											1 month	2 months	3 months	6 months
Term of debt used to determine interest rate																											9 years	12 years
Interest rate at period end		4.38%
Interest coverage ratio																													3.5
Senior leverage ratio																													1.20	1.75
Minimum prepayment percentage of excess cash flow																										50.00%
Minimum prepayment percentage of net cash proceeds of issuances or incurrences of debt obligations																										100.00%
Minimum prepayment percentage of net proceeeds of asset sales over threshold amount																										100.00%
Net proceeds of asset sales threshold to trigger prepayment																										2,500,000.0
Stated interest rate					4.00%	4.00%
Debt issuance cost related to term loan	4,500,000
Amortization period For debt issuance cost term loan	5 years
Debt issuance cost																		2,500,000						800,000
Outstanding principal balance of term loan as of balance sheet date		36,300,000
Interest expense incurred		500,000
Annual amortization year one																			10.00%
Amortization year two		10.00%
Amortization year three		10.00%
Amortization year four		10.00%
Amortization year five and after																			60.00%
Current portion of long-term debt		$ 12,800,000		$ 12,750,000