Indebtedness (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Debt Instrument [Line Items]
Debt	$ 201,044	$ 179,984
Less: current portion (included in Other liabilities)	(240)	(363)
Long-term debt	200,804	179,621	[1]
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Debt	200,705	179,470
Other [Member]
Debt Instrument [Line Items]
Debt	$ 339	$ 514

[1] Derived from audited financial statements