BANK BORROWINGS AND LONG-TERM DEBT - Borrowings Outstanding (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015	Feb. 20, 2013
Bank borrowings and long-term debt
Carrying Amount	$ 2,791,906
Debt issuance costs	(17,351)	$ (12,733)
Long-term Debt, net of debt issuance cost	2,774,555	2,071,000
Current portion, net of debt issuance costs	(65,166)	(45,030)
Non-current portion	$ 2,709,389	$ 2,025,970
Weighted average interest rate (as a percent)	3.50%	3.20%
Term Loan, including current portion, due in installments through August 2018
Bank borrowings and long-term debt
Carrying Amount	$ 577,500	$ 592,500
Term Loan, including current portion, due in installments through March 2019
Bank borrowings and long-term debt
Carrying Amount	$ 547,500	475,000
4.625% Notes due February 2020
Bank borrowings and long-term debt
Debt instrument interest rate (as a percent)	4.625%		4.625%
Carrying Amount	$ 500,000	500,000
5.000% Notes due February 2023
Bank borrowings and long-term debt
Debt instrument interest rate (as a percent)	5.00%		5.00%
Carrying Amount	$ 500,000	500,000
4.750% Notes due June 2025
Bank borrowings and long-term debt
Debt instrument interest rate (as a percent)	4.75%
Carrying Amount	$ 595,589	0
Other
Bank borrowings and long-term debt
Carrying Amount	$ 71,317	$ 16,233

Long-term Debt, Net of Debt Issuance Costs

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- Definition

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

+ 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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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
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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

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- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ 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 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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