Fair Value Measurements (Levels 1-3) (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Fair value
Assets (Liabilities) at fair value
Non-qualified deferred compensation asset	$ 6,408	$ 6,083
Non-qualified deferred compensation liability	(4,042)	(6,301)
Contingent consideration for business acquisitions	(300)	(20,000)
Level 1
Assets (Liabilities) at fair value
Non-qualified deferred compensation asset	6,408	6,083
Non-qualified deferred compensation liability	(4,042)	(6,301)
Contingent consideration for business acquisitions	0	0
Level 2
Assets (Liabilities) at fair value
Non-qualified deferred compensation asset	0	0
Non-qualified deferred compensation liability	0	0
Contingent consideration for business acquisitions	(300)	0
Level 3
Assets (Liabilities) at fair value
Non-qualified deferred compensation asset	0	0
Non-qualified deferred compensation liability	0	0
Contingent consideration for business acquisitions	0	(20,000)
Designated as hedging instrument \| Fair value
Assets (Liabilities) at fair value
Derivatives asset	1,415	2,903
Derivatives liability		(2,549)
Designated as hedging instrument \| Level 1
Assets (Liabilities) at fair value
Derivatives asset	0	0
Derivatives liability		0
Designated as hedging instrument \| Level 2
Assets (Liabilities) at fair value
Derivatives asset	1,415	2,903
Derivatives liability		(2,549)
Designated as hedging instrument \| Level 3
Assets (Liabilities) at fair value
Derivatives asset	0	0
Derivatives liability		$ 0
Non-designated derivatives \| Fair value
Assets (Liabilities) at fair value
Derivatives asset	635
Non-designated derivatives \| Level 1
Assets (Liabilities) at fair value
Derivatives asset	0
Non-designated derivatives \| Level 2
Assets (Liabilities) at fair value
Derivatives asset	635
Non-designated derivatives \| Level 3
Assets (Liabilities) at fair value
Derivatives asset	$ 0

Amount of liability recognized arising from contingent consideration in a business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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+ References

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+ 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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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

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