Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Recorded value [Member] | SERP obligations - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:		$ 3,323
Recorded value [Member] | Restructuring liabilities - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	1,185	5,447
Recorded value [Member] | Restructuring liabilities - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	389	852
Recorded value [Member] | Other employee benefit plans obligations - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	196	196
Recorded value [Member] | Goodwill [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	15,223	15,198
Recorded value [Member] | Intangible Assets [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	14,951	14,135
Active markets for identical assets or liabilities (Level 1) [Member] | SERP obligations - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:		0
Active markets for identical assets or liabilities (Level 1) [Member] | Restructuring liabilities - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Active markets for identical assets or liabilities (Level 1) [Member] | Restructuring liabilities - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Active markets for identical assets or liabilities (Level 1) [Member] | Other employee benefit plans obligations - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Active markets for identical assets or liabilities (Level 1) [Member] | Goodwill [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	0	0
Active markets for identical assets or liabilities (Level 1) [Member] | Intangible Assets [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | SERP obligations - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:		0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Restructuring liabilities - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Restructuring liabilities - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Other employee benefit plans obligations - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Goodwill [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	0	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Intangible Assets [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	0	0
Active markets for unobservable inputs (Level 3) [Member] | SERP obligations - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:		3,323
Active markets for unobservable inputs (Level 3) [Member] | Restructuring liabilities - current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	1,185	5,447
Active markets for unobservable inputs (Level 3) [Member] | Restructuring liabilities - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	389	852
Active markets for unobservable inputs (Level 3) [Member] | Other employee benefit plans obligations - non-current [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Liabilities:	196	196
Active markets for unobservable inputs (Level 3) [Member] | Goodwill [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	15,223	15,198
Active markets for unobservable inputs (Level 3) [Member] | Intangible Assets [Member]
Financial and nonfinancial assets and liabilities measured at fair value on a nonrecurring basis
Assets:	$ 14,951	$ 14,135