Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from Operating Activities
NET INCOME	$ 8,198,000	$ 7,760,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,396,000	2,861,000
Loss on disposal of assets	67,000	141,000
Stock compensation expense	658,000	590,000
Write-off of uncollectible accounts	616,000	730,000
Changes in operating assets and liabilities
Accounts receivable	(465,000)	(2,173,000)
Customer deposits	931,000	(548,000)
Prepaid taxes and expenses	(242,000)	2,459,000
Other assets	(63,000)	212,000
Accounts and taxes payable	4,803,000	739,000
Accrued liabilities	(2,526,000)	(1,629,000)
Deferred income tax	(194,000)	(223,000)
Net cash provided by operating activities	15,179,000	10,919,000
Cash Flows from Investing Activities
Purchase of property and equipment	(6,963,000)	(5,090,000)
Net cash (used in) investing activities	(6,963,000)	(5,090,000)
Cash Flows from Financing Activities
Purchase of treasury stock	(3,673,000)	(5,469,000)
Tax effect of stock option exercises	284,000	248,000
Exercise of common stock options	481,000	592,000
Net cash (used in) financing activities	(2,908,000)	(4,629,000)
Increase in cash and cash equivalents	5,308,000	1,200,000
Cash and cash equivalents at beginning of period	12,269,000	10,242,000
Cash and cash equivalents at end of period	17,577,000	11,442,000
Supplemental Cash Flow Information:
Income taxes paid	291,000	827,000
Purchase of software license under finance agreement		$ 1,700,000