Goodwill And Intangible Assets (Gross Intangible Assets And Related Accumulated Amortization) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Intangible Assets [Line Items]
Gross Carrying Amount	$ 70,339
Accumulated Amortization	(27,385)
Net carrying value of intangible assets	42,954
Patents [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	6,068
Accumulated Amortization	(5,639)
Non-amortized intangibles (primarily trademarks and trade names) [Member]
Intangible Assets [Line Items]
Accumulated Amortization	0
Non-amortized intangibles	22,999
Customer relationships [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	32,997
Accumulated Amortization	(16,424)
Backlog [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	1,084
Accumulated Amortization	(1,084)
Other [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	7,191
Accumulated Amortization	$ (4,238)