CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Cash flows from operating activities:
Net income	$ 16,659	$ 20,871	$ 26,002
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,411	1,375	1,321
Share based compensation	2,246	2,171	1,594
Deferred income taxes	(56)	348	(305)
Bad debt expense	47	48	18
(Increase) decrease in operating assets and increase (decrease) in liabilities:
Accounts receivable	366	64	766
Inventories - finished goods	(1,077)	3,924	(2,286)
Prepaid income taxes	465	(335)	32
Prepaid expenses and other current assets	(205)	(426)	144
Accounts payable	297	1,964	313
Accrued expenses and other current liabilities	238	102	86
Net cash provided by operating activities	20,391	30,106	27,685
Cash flows from investing activities:
Net change in investments	12,344	(10,146)	2,150
Purchases of property and equipment	(705)	(667)	(1,047)
Purchases of intangible asset		(10)
Net cash provided by (used in) investing activities	11,639	(10,823)	1,103
Cash flows from financing activities:
Dividends paid	(10,964)	(10,727)	(6,805)
Purchases of treasury stock	(23,685)	(12,247)
Proceeds from the exercise of stock options		340	735
Tax benefit related to stock options exercised			299
Tax adjustment related to stock compensation	(240)	(132)
Net cash used in financing activities	(34,889)	(22,766)	(5,771)
Net (decrease) increase in cash and cash equivalents	(2,859)	(3,483)	23,017
Cash and cash equivalents, at beginning of year	49,660	53,143	30,126
Cash and cash equivalents, at end of year	46,801	49,660	53,143
Supplemental disclosure of cash flow information:
Cash paid for income taxes	9,543	12,578	14,719
Retirement of treasury stock	23,685	12,247
Property and equipment purchases in accounts payable		130	418
Dividends payable in accrued expenses	$ 168	$ 143	$ 48