Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowances for accounts receivable	$ 1,764	$ 2,680
Accumulated amortization on intangible assets	$ 7,065	$ 5,382
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	14,703,084	14,703,084
Treasury stock, shares	5,023,916	4,969,679