LONG-TERM DEBT OBLIGATIONS, Term Loan and Revolving Credit Facility Narrative (Details) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended			0 Months Ended									0 Months Ended			0 Months Ended		0 Months Ended			1 Months Ended				1 Months Ended		0 Months Ended		1 Months Ended
	Jun. 25, 2012	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 4.00% Convertible Senior Notes	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] 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]	Jun. 30, 2014 Term Loan [Member]	Oct. 17, 2013 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. 31, 2013 Senior Secured Credit Facility [Member] Interest Period Option 1 [Member]	Oct. 31, 2013 Senior Secured Credit Facility [Member] Interest Period Option 2 [Member]	Oct. 31, 2013 Senior Secured Credit Facility [Member] Minimum [Member]	Oct. 17, 2013 Senior Secured Credit Facility [Member] Minimum [Member]	Oct. 31, 2013 Senior Secured Credit Facility [Member] Maximum [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]	Oct. 31, 2013 Senior Secured Credit Facility [Member] London Interbank Offered Rate (LIBOR) [Member]	Jul. 28, 2014 Subsequent Event [Member]
Debt Instrument [Line Items]
Current portion of long-term debt		$ 4,000,000	$ 4,000,000	$ 12,750,000
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	10,000,000
Basis spread on variable rate						1.50%	1.75%					2.50%	2.75%																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%	4.38%
Uncommitted incremental term loan facility capacity																																50,000,000
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
Stated interest rate					4.00%
Debt-related covenants			As of June 30, 2014, the Company was in compliance with the covenants.
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		25,000,000	25,000,000
Interest expense incurred		400,000	1,000,000
Outstanding balance under revolving credit facility		$ 0	$ 0
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%