DEBT (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Debt
Debt	$ 628,773,000us-gaap_LongTermDebt	$ 626,533,000us-gaap_LongTermDebt
Term loans
Debt
Debt	498,800,000
Senior Unsecured Credit Facility
Debt
Maximum borrowing capacity	300,000,000
Maximum increase in borrowing capacity available through accordion feature option	100,000,000
Line of credit outstanding	205,000,000
Amount available for borrowing	81,200,000
Senior Unsecured Credit Facility \| $225 Million Revolver
Debt
Maximum borrowing capacity	225,000,000
Senior Unsecured Credit Facility \| $75 Million Term Loan
Debt
Maximum borrowing capacity	75,000,000
Senior Unsecured Credit Facility \| Standby letters of credit
Debt
Line of credit outstanding	$ 13,800,000

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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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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