CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net earnings	$ 29,571	$ 22,992
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation and amortization	60,231	70,254
Loss on disposal or impairment of assets	25	2,893
Deferred income taxes	(3,466)	1,135
Non-cash share-based compensation expense	5,803	5,200
Changes in operating assets and liabilities:
Accounts receivable, net	1,942	(9,676)
Other assets	(4,736)	(4,592)
Deferred costs	(1,274)	(831)
Accounts payable and other liabilities	(38,132)	6,071
Deferred revenue	(12,596)	(2,978)
Net cash provided by operating activities	37,368	90,468
Cash flows from investing activities:
Disposition of operations		(1,043)
Capitalized software development costs	(7,747)	(1,520)
Capital expenditures	(11,716)	(24,711)
Data acquisition costs	(3,698)	(4,550)
Net cash paid in acquisitions		(255)
Net cash used in investing activities	(23,161)	(32,079)
Cash flows from financing activities:
Payments of debt	(13,538)	(113,775)
Acquisition liability payment	(287)	(326)
Acquisition of treasury stock	(47,100)	(34,100)
Sale of common stock	5,735	2,818
Net cash used in financing activities	(55,190)	(145,383)
Effect of exchange rate changes on cash	(261)	(866)
Net change in cash and cash equivalents	(41,244)	(87,860)
Cash and cash equivalents at beginning of period	229,648	206,973
Cash and cash equivalents at end of period	188,404	119,113
Cash paid during the period for:
Interest	6,500	11,331
Income taxes	36,134	5,387
Payments on capital leases and installment payment arrangements	8,946	8,978
Prepayments of debt		100,000
Other debt payments	4,592	4,797
Non-cash investing and financing activities:
Acquisition of property and equipment under capital leases and installment payment arrangements	$ 2,157	$ 4,691