Income Taxes Unrecognized Tax Benefit (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 806,000	$ 1,080,000	$ 1,003,000
Additions for tax positions taken in the current fiscal year	279,000	131,000	145,000
Additions for tax positions taken in prior fiscal years			7,000
Decrease for tax positions taken in prior fiscal years (payment of tax)		(12,000)
Decreases for lapses in statutes of limitation	(111,000)	(229,000)	(75,000)
Decreases for settlements with taxing authorities		(164,000)
Unrecognized tax benefits, ending balance	974,000	806,000	1,080,000
Accrued tax penalties and interest related to unrecognized tax benefits	57,000	60,000
Tax penalties and interest related to unrecognized tax benefits recognized in current year tax provision	(3,000)	(64,000)	33,000
Minimum
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Expected reduction in unrecognized tax benefit resulting from lapse of applicable statute of imitations expected in the next twelve months	0
Maximum
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Expected reduction in unrecognized tax benefit resulting from lapse of applicable statute of imitations expected in the next twelve months	$ 29,000