Employee Benefit Plans Employee Benefit Plans - Supplemental Executive Retirement Plan (Details Textual) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Mar. 25, 2011 Supplemental Executive Retirement Plan [Member]	Apr. 30, 2012 Supplemental Executive Retirement Plan [Member]	Mar. 31, 2012 Supplemental Executive Retirement Plan [Member]	Mar. 31, 2011 Supplemental Executive Retirement Plan [Member]	Dec. 31, 2011 Supplemental Executive Retirement Plan [Member] Former Officer [Member]	Mar. 31, 2011 Benefit Equalization Plan and Supplemental Executive Retirement Plan [Member]	Mar. 31, 2012 Benefit Equalization Plan and Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation			$ 3,300,000	$ 5,700,000
Defined benefit plan, accumulated benefit obligation			3,300,000	5,700,000
Defined benefit plan, annual expense			100,000	500,000
Defined benefit plan, non-cash curtailment charge	(37,000)
Defined benefit plan, curtailment gain (loss)				1,200,000
Defined benefit plan, curtailment gain (loss), reduction in service for officer				800,000
Defined benefit plan, curtailment gain (loss), change in discount rate				400,000
Defined benefit plan, curtailment gain (loss), change in discount rate, discount rate for plan termination liabilities				2.16%
Defined benefit plan, benefits paid		3,200,000			2,500,000
Defined benefit plan, service credit obligation		100,000
Defined benefit plan, non-cash settlement charges included within Restructuring charges in Consolidated Statements of Operations				400,000
Proceeds from surrender of corporate-owned life insurance policies						13,700,000
Proceeds from corporate-owned life insurance policies during period						2,200,000
Corporate-owned life insurance policies, gain (loss) recognized and classified within Other (income) expenses, net on Consolidated Statements of Operations						2,100,000
Marketable securities held in Rabbi Trust, fair value						$ 13,700,000	$ 4,400,000