Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from Operating Activities
Net Income	$ 15,167,000	$ 16,182,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,916,000	8,718,000
Loss (gain) on disposal of assets	(5,000)	12,000
Stock compensation expense	1,104,000	1,162,000
Write-off of uncollectible accounts	897,000	785,000
Deferred income tax	(399,000)	(450,000)
Changes in operating assets and liabilities
Accounts receivable	(2,585,000)	(3,856,000)
Customer deposits	(7,403,000)	(311,000)
Prepaid taxes and expenses	5,205,000	(1,021,000)
Other assets	(571,000)	160,000
Accounts and taxes payable	(271,000)	(4,277,000)
Accrued liabilities	3,535,000	(1,466,000)
Net cash provided by operating activities	24,590,000	15,638,000
Cash Flows from Investing Activities
Investment in private equity	(600,000)	(800,000)
Purchase of property and equipment	(8,025,000)	(9,873,000)
Net cash (used in) investing activities	(8,625,000)	(10,673,000)
Cash Flows from Financing Activities
Purchase of treasury stock	(18,775,000)	(13,158,000)
Tax effect of stock option exercises	475,000	544,000
Exercise of common stock options	1,525,000	745,000
Exercise of employee stock purchase options	181,000	200,000
Net cash (used in) financing activities	(16,594,000)	(11,669,000)
Decrease in cash and cash equivalents	(629,000)	(6,704,000)
Cash and cash equivalents at beginning of period	25,516,000	34,866,000
Cash and cash equivalents at end of period	24,887,000	28,162,000
Supplemental Cash Flow Information:
Income taxes paid	$ 6,946,000	$ 10,632,000