Fair Value Of Financial Assets And Liabilities (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Estimate of Fair Value, Fair Value Disclosure [Member]
Assets, Fair Value Disclosure [Abstract]
Deferred compensation plan assets	$ 16,255	$ 13,631
Derivative assets - variable interest rate swap agreements		2,490
Total assets measured at fair value on a recurring basis	16,255	16,121
Liabilities, Fair Value Disclosure [Abstract]
Deferred compensation plan liabilities	16,255	13,631
Contingent consideration liabilities	2,028	3,632
Total liabilities measured at fair value on a recurring basis	18,283	17,263
Quoted Prices In Active Markets Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Deferred compensation plan assets	16,255	13,631
Derivative assets - variable interest rate swap agreements		0
Total assets measured at fair value on a recurring basis	16,255	13,631
Liabilities, Fair Value Disclosure [Abstract]
Deferred compensation plan liabilities	16,255	13,631
Contingent consideration liabilities	0	0
Total liabilities measured at fair value on a recurring basis	16,255	13,631
Significant Other Observable Inputs Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Deferred compensation plan assets	0	0
Derivative assets - variable interest rate swap agreements		2,490
Total assets measured at fair value on a recurring basis	0	2,490
Liabilities, Fair Value Disclosure [Abstract]
Deferred compensation plan liabilities	0	0
Contingent consideration liabilities	0	0
Total liabilities measured at fair value on a recurring basis	0	0
Significant Unobservable Inputs Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Deferred compensation plan assets	0	0
Derivative assets - variable interest rate swap agreements		0
Total assets measured at fair value on a recurring basis	0	0
Liabilities, Fair Value Disclosure [Abstract]
Deferred compensation plan liabilities	0	0
Contingent consideration liabilities	2,028	3,632
Total liabilities measured at fair value on a recurring basis	$ 2,028	$ 3,632