Restructuring and Other Special Charges (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 companies division	Jun. 30, 2011 Severance Costs [Member]	Dec. 31, 2012 Severance Costs [Member]	Mar. 31, 2012 Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Number of regional companies consolidated into divisions					12
Number of new divisions resulting from restructuring					4
Restructuring costs	$ 400,000	$ 748,000	$ 1,165,000	$ 14,078,000		$ 13,300,000	$ 0
Restructuring charges (benefits), net	(3,332,000)		(2,535,000)
Restructuring reserve, accrual adjustment			(3,700,000)				(3,700,000)
Restructuring Reserve	6,642,000		6,642,000		14,128,000		6,318,000	13,138,000
Restructuring Reserve, Current	4,800,000		4,800,000
Restructuring Reserve, Noncurrent	1,800,000		1,800,000
Restructuring, other related costs	1,603,000	1,683,000	7,232,000	1,683,000
Restructuring and related cost, expected cost			2,000,000
Asset impairment charges	$ 0	$ 0	$ 1,729,000	$ 2,500,000