FINANCIAL INFORMATION Financial Information (Details) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jul. 31, 2015	Jun. 23, 2015	Jun. 22, 2015	Jun. 15, 2015	Jun. 08, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Stock Repurchase Program, Authorized Amount							$ 9,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	480,601		586,825
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,400,000
Convertible Notes Payable, Noncurrent	125,000,000					$ 125,000,000
Accounts Payable, Interest-bearing, Interest Rate						2.00%
Net Proceeds from Issuance of Convertible Notes Payable						$ 120,600,000
Capped Call Transaction Costs	$ 10,125,000	$ 0
Business Combination, Contingent Consideration, Liability, Current				$ 5.67
Value of Business Acquired (VOBA)				$ 66,000,000
Line of Credit Facility, Current Borrowing Capacity					$ 35,000,000
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases					$ 15,000,000
Line of Credit Facility, Interest Rate Description	Interest accrues on outstanding borrowings under the Credit Facility at a rate of a Eurodollar Rate (as defined in the Credit Facility) plus 2.00% or a Base Rate (as defined in the Credit Facility) plus 1.00%, at the option of the Company. The Company must also pay to the Lenders, on a quarterly basis, an unused line fee at a rate of 0.25% per annum on an amount equal to (1) the average lending commitments under the Credit Facility during the immediately preceding quarter less (2) the average daily amount of the outstanding borrowings plus the undrawn amount of any outstanding letters of credit under the Credit Facility during the immediately preceding quarter. During the term of the Credit Facility, the Company is entitled to reduce the maximum amounts of the Lenders’ commitments, subject to the payment of certain fees based on the amount of any reduction.
Accrued Liabilities, Current	$ 38,047,000							$ 32,353,000
Cash and Cash Equivalents, at Carrying Value	34,647,000							$ 25,056,000	$ 23,049,000	$ 48,203,000
Net Cash Provided by (Used in) Operating Activities	(26,214,000)	$ (26,082,000)
Repurchase Agreements [Member]
Stock Repurchase Program, Authorized Amount							$ 8,000,000
Share Repurchase Program [Domain]
Accrued Liabilities, Current	$ 6,600,000