FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Fair Value Measurement Disclosures
Corporate borrowings	$ 1,771,628us-gaap_LongTermDebtNoncurrent	$ 1,775,132us-gaap_LongTermDebtNoncurrent	$ 2,069,672us-gaap_LongTermDebtNoncurrent
Significant other observable inputs (Level 2)
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	14,577	14,390	7,779
Corporate Borrowings	1,788,035	1,765,678	2,090,332
Significant unobservable inputs (Level 3)
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	1,389	1,389	1,389
Corporate Borrowings	5,555	5,555	6,944
Total Carrying Value
Other Fair Value Measurement Disclosures
Current Maturities of Corporate Borrowings	15,873
Corporate borrowings	$ 1,771,628

The fair value of the long-term debt current maturities which are not separately disclosed in the statement of financial position.

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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.

+ References

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 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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