UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Mar. 31, 2012	$ 127	$ 93,545	$ (65,416)	$ 190,906	$ 465	$ 219,627
Balance (in shares) at Mar. 31, 2012	7,999,895					7,999,895
Issuance of shares for option exercises	1	1,166	0	0	0	1,167
Issuance of shares for option exercises (in shares)	105,000					105,000	[1]
Excess tax benefit of share based compensation	0	1,390	0	0	0	1,390
Effect of share-based compensation	1	2,494	0	0	0	2,495
Effect of share-based compensation (in shares)	103,657
Purchase of treasury stock	0	0	(1,890)	0	0	(1,890)
Purchase of treasury stock (in shares)	(57,351)
Dividends declared	0	0	0	(20,378)	0	(20,378)
Net earnings	0	0	0	27,128	0	27,128
Foreign currency translation adjustment (net of tax of $1)	0	0	0	0	15	15
Balance at Dec. 31, 2012	$ 129	$ 98,595	$ (67,306)	$ 197,656	$ 480	$ 229,554
Balance (in shares) at Dec. 31, 2012	8,151,201					8,151,201

[1] The total intrinsic value of stock options exercised during the nine months ended December 31, 2012 was $2.9 million.