Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 27,332	$ 15,680	$ 42,724
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	9,323	8,069	6,928
Amortization of capitalized software costs	12,817	12,338	9,668
Amortization of other intangibles	7,127	8,330	7,559
Provision for bad debts	855	1,467	6,885
Provision (recovery) for inventory obsolescence	25	0	193
Share-based compensation	3,472	2,490	2,327
Deferred income tax benefit	(12,061)	(3,984)	(9,565)
Excess tax benefit from share-based compensation	0	(183)	157
Change in fair value of contingent consideration	1,937	101	1,272
Impairment of goodwill and other assets	0	25,971	17,400
Loss (gain) on disposal of equipment and improvements	51	192	0
Changes in assets and liabilities, net of amounts acquired:
Accounts receivable	4,744	37,461	(7,988)
Inventories	187	(81)	339
Other current assets	35	3,985	(4,049)
Other assets	(1,052)	(1,662)	(2,777)
Accounts payable	1,281	(4,170)	6,223
Deferred revenue	(5,610)	1,036	(17,993)
Accrued compensation and related benefits	8,098	4,038	45
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	18,178	(9,227)	3,710
Other current liabilities	5,081	211	9,079
Deferred compensation	941	1,000	312
Other noncurrent liabilities	(3)	989	(4,384)
Net cash provided by operating activities	82,758	104,051	68,065
Cash flows from investing activities:
Additions to capitalized software costs	(14,601)	(20,784)	(29,455)
Additions to equipment and improvements	(6,531)	(7,934)	(9,969)
Proceeds from sale of marketable securities	11,077	15,475	4,960
Purchase of marketable securities	(12,123)	(15,386)	(12,084)
Payment of contingent consideration related to acquisitions	0	(3,423)	(2,353)
Net cash used in investing activities	(24,523)	(63,662)	(53,654)
Cash flows from financing activities:
Excess tax benefit from share-based compensation	0	183	84
Proceeds from exercise of stock options	383	2,200	948
Dividends paid	(42,770)	(42,203)	(41,535)
Net cash used in financing activities	(42,387)	(43,243)	(42,856)
Net increase in cash and cash equivalents	15,848	(2,854)	(28,445)
Cash and cash equivalents at beginning of period	103,145	105,999
Cash and cash equivalents at end of period	118,993	103,145	105,999
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes, net of refunds	2,523	20,443	31,656
Non-cash investing activities:
Tenant improvement allowance received from landlord	0	0	965
Common stock issued at fair value for ViaTrack earnout settlement	0	0	3,000
Dividends Payable	10,700	10,686	10,418
Unpaid additions to equipment and improvements	849	419	0
Effective March 11, 2015, September 9, 2013, May 1, 2012, and April 16, 2012, the company acquired Gennius, Mirth, Poseidon and Matrix, respectively in transactions summarized as follows:
Common Stock issued at fair value	0	0	(3,953)
Poseidon [Member]
Cash flows from investing activities:
Payments to Acquire Businesses, Gross	0	0	2,033
Payment for acquiring businesses	0	0	(2,033)
Effective March 11, 2015, September 9, 2013, May 1, 2012, and April 16, 2012, the company acquired Gennius, Mirth, Poseidon and Matrix, respectively in transactions summarized as follows:
Payments to Acquire Businesses, Gross	0	0	2,033
Payments to Acquire Businesses, Gross	0	0	(2,033)
Purchase price holdback	0	0	(500)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0	0	18
Matrix [Member]
Cash flows from investing activities:
Payments to Acquire Businesses, Gross	0	0	5,073
Payment for acquiring businesses	0	0	(5,073)
Effective March 11, 2015, September 9, 2013, May 1, 2012, and April 16, 2012, the company acquired Gennius, Mirth, Poseidon and Matrix, respectively in transactions summarized as follows:
Fair value of assets acquired	0	0	14,587
Payments to Acquire Businesses, Gross	0	0	5,073
Payments to Acquire Businesses, Gross	0	0	(5,073)
Purchase price holdback	0	0	(853)
Fair value of contingent consideration	0	0	(2,862)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0	0	746
Business Acquisition, Cost of Acquired Entity, Non-compete Agreement	0	0	(1,100)
Mirth [Member]
Cash flows from investing activities:
Payments to Acquire Businesses, Gross	0	35,033	0
Payment for acquiring businesses	0	(35,033)	0
Effective March 11, 2015, September 9, 2013, May 1, 2012, and April 16, 2012, the company acquired Gennius, Mirth, Poseidon and Matrix, respectively in transactions summarized as follows:
Fair value of assets acquired	0	62,787	0
Payments to Acquire Businesses, Gross	0	35,033	0
Payments to Acquire Businesses, Gross	0	(35,033)	0
Common Stock issued at fair value	0	(7,882)	0
Fair value of contingent consideration	0	(13,307)	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0	6,565	0
Gennius [Member]
Cash flows from investing activities:
Payments to Acquire Businesses, Gross	2,345
Payment for acquiring businesses	(2,345)	0	0
Effective March 11, 2015, September 9, 2013, May 1, 2012, and April 16, 2012, the company acquired Gennius, Mirth, Poseidon and Matrix, respectively in transactions summarized as follows:
Fair value of assets acquired	2,571
Payments to Acquire Businesses, Gross	2,345
Payments to Acquire Businesses, Gross	(2,345)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 226	$ 0	$ 0