CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net earnings	$ 22,959	$ 29,571
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation and amortization	50,519	60,231
Loss on disposal or impairment of assets		25
Deferred income taxes	(528)	(3,466)
Non-cash share-based compensation expense	6,889	5,803
Changes in operating assets and liabilities:
Accounts receivable, net	(5,864)	1,942
Other assets	145	(4,736)
Deferred costs		(1,274)
Accounts payable and other liabilities	(20,667)	(38,132)
Deferred revenue	3,917	(12,596)
Net cash provided by operating activities	57,370	37,368
Cash flows from investing activities:
Capitalized software development costs	(13,614)	(7,747)
Capital expenditures	(18,189)	(11,716)
Data acquisition costs	(2,874)	(3,698)
Net cash used in investing activities	(34,677)	(23,161)
Cash flows from financing activities:
Payments of debt	(9,233)	(13,538)
Acquisition liability payment		(287)
Acquisition of treasury stock	(38,837)	(47,100)
Sale of common stock	18,559	5,735
Net cash used in financing activities	(29,511)	(55,190)
Effect of exchange rate changes on cash	460	(261)
Net change in cash and cash equivalents	(6,358)	(41,244)
Cash and cash equivalents at beginning of period	222,974	229,648
Cash and cash equivalents at end of period	216,616	188,404
Cash paid during the period for:
Interest	5,986	6,500
Income taxes	11,008	36,134
Payments on capital leases and installment payment arrangements	5,239	8,946
Other debt payments	3,994	4,592
Non-cash investing and financing activities:
Acquisition of property and equipment under capital leases and installment payment arrangements		$ 2,157