Amortization period of debt issuance costs for Term Loan.

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Debt Instrument, Sum of LIBOR Interest Period Advance Determination

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Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees) for Term Loan.

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Interest Coverage ratio

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Minimum Prepayment Percentage of Excess Cash Flow

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Minimum Prepayment Percentage of Net Cash Proceeds of Issuances or Incurrences of Debt Obligations

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Minimum Prepayment Percentage of Net Proceeds of Asset Sales Over Threshold Amount

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Net Proceeds of Asset Sales Threshold to Trigger Prepayment

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Number of Days in a Year Used to Calculate Rate

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Senior Leverage Ratio

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Term of Debt Used to Determine Interest Rate

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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LONG-TERM DEBT OBLIGATIONS, TERM LOAN AND REVOLVING CREDIT FACILITY NARRATIVE (Details)			1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 17, 2013 USD ($)	Jun. 25, 2012 USD ($)	Oct. 31, 2013	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jul. 28, 2014 USD ($)
Debt Instrument [Line Items]
Current portion of long-term debt				$ 4,000,000	$ 4,000,000	$ 4,000,000
Interest rate at period end				3.04%	3.04%
Uncommitted incremental term loan facility capacity							$ 50,000,000
Debt issuance cost related to term loan		$ 4,500,000
Amortization period For debt issuance cost term loan		5 years
Outstanding principal balance of term loan as of balance sheet date				$ 20,000,000	$ 20,000,000
Interest expense incurred				300,000	800,000
Outstanding balance under revolving credit facility				$ 0	$ 0
4.00% Convertible Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.00%	4.00%
Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
London Interbank Offered Rate (LIBOR) [Member] \| Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Sum of LIBOR interest period advance determination	1 month
London Interbank Offered Rate (LIBOR) [Member] \| Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Sum of LIBOR interest period advance determination	2 months
London Interbank Offered Rate (LIBOR) [Member] \| Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Sum of LIBOR interest period advance determination	3 months
London Interbank Offered Rate (LIBOR) [Member] \| Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Sum of LIBOR interest period advance determination	6 months
London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Term Loan and Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Face amount		$ 100,000,000.0
Term Loan [Member]
Debt Instrument [Line Items]
Debt term		5 years
Face amount		$ 85,000,000.0
Debt outstanding	$ 38,000,000
Debt issuance cost		2,500,000
Annual amortization year one				10.00%	10.00%
Amortization year two				10.00%	10.00%
Amortization year three				10.00%	10.00%
Amortization year four				10.00%	10.00%
Amortization year five and after				60.00%	60.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt term	5 years
Face amount	$ 10,000,000.0
Original revolving credit facility		15,000,000.0
Debt outstanding	10,000,000
Refinanced Term Loan [Member]
Debt Instrument [Line Items]
Face amount	$ 38,000,000.0
Debt issuance cost		$ 800,000
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
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
Senior Secured Credit Facility [Member] \| Interest Period Option 1 [Member]
Debt Instrument [Line Items]
Term of debt used to determine interest rate			9 years
Senior Secured Credit Facility [Member] \| Interest Period Option 2 [Member]
Debt Instrument [Line Items]
Term of debt used to determine interest rate			12 years
Senior Secured Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Number of days in a year used to calculate rate			365 days
Interest coverage ratio	3.5
Senior leverage ratio	1.20
Senior Secured Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Number of days in a year used to calculate rate			366 days
Senior leverage ratio	1.75
Senior Secured Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Senior Secured Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Number of days in a year used to calculate rate			360 days
Sum of LIBOR interest period	1 month