Accounting for Equity-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012
Company's stock option and SAR grants to equity incentive plans
Outstanding at March 31, 2012, Number of Options/SAR Units	11,533
Outstanding at March 31, 2012, Weighted Average Exercise Price	$ 11.49
Options granted, Number of options/SAR Units	180
Options granted, Weighted Average Exercise Price	$ 5.98
SAR units granted, Number of options/SAR Units	0
SAR units granted, Weighted Average Exercise Price	$ 0.00
Options / SAR units cancelled/forfeited/expired, Number of Options/SAR Units	(640)
Options / SAR units cancelled/forfeited/expired, Weighted Average Exercise Price	$ 14.08
Options / SAR units exercised, Number of Options/SAR Units	(59)
Options / SAR units exercised, Weighted Average Exercise Price	$ 5.97
Outstanding at June 30, 2012, Number of Options/SAR Units	11,015
Outstanding at June 30, 2012, Weighted Average Exercise Price	$ 11.28
Outstanding at June 30, 2012, Weighted Average Remaining Contractual Term (years)	3 years 6 months 15 days
Outstanding at June 30, 2012, Aggregate Value	$ 1,120
Exercisable at June 30, 2012, Number of Options/SAR Units	7,795
Exercisable at June 30, 2012, Weighted Average Exercise Price	$ 13.17
Exercisable at June 30, 2012, Weighted Average Remaining Contractual Term (years)	2 years 6 months 29 days
Exercisable at June 30, 2012, Aggregate Value	$ 617