LONG-TERM DEBT OBLIGATIONS, Term Loan and Revolving Credit Facility Narrative (Details) (USD $)	0 Months Ended	3 Months Ended	9 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	Sep. 30, 2014	Sep. 30, 2014	Jul. 28, 2014	Dec. 31, 2013	Sep. 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]	Sep. 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]
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		3.13%	3.13%
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 proceeds of asset sales over threshold amount																							100.00%
Net proceeds of asset sales threshold to trigger prepayment																							2,500,000
Debt Instrument, Interest Rate, Stated Percentage						4.00%
Debt-related covenants			As of September 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		24,000,000	24,000,000
Interest expense incurred		400,000	1,400,000
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%