Income Taxes Income Tax Provision (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Income Tax Contingency [Line Items]
Effective income tax rate	(44.30%)	354.20%
Expected tax rate	37.80%
Effective income tax rate reconciliation, adjustment	(14.00%)	(382.90%)
Permanent items	$ 6,327	$ 3,914