Note 10 - Intangible Assets (Details) - Identifiable Intangible Assets (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 109,870	$ 95,926
Accumulated Amortization	68,015	59,703
Net Carrying Amount	41,855	36,223
Data Content [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56,974	49,185
Accumulated Amortization	27,644	22,419
Net Carrying Amount	29,329	26,766
Client Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,821	22,915
Accumulated Amortization	17,443	16,185
Net Carrying Amount	8,378	6,730
Software Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	22,881	20,914
Accumulated Amortization	20,089	19,126
Net Carrying Amount	2,792	1,788
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,465	2,154
Accumulated Amortization	1,881	1,293
Net Carrying Amount	584	861
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,729	758
Accumulated Amortization	958	680
Net Carrying Amount	$ 771	$ 78