Note 11 - Subsequent Events (Details) (USD $)	1 Months Ended	6 Months Ended		1 Months Ended								1 Months Ended	3 Months Ended	1 Months Ended
	Apr. 30, 2012	Jun. 30, 2012	Aug. 31, 2011	Jul. 31, 2013 Subsequent Event [Member] Brinderson LP [Member]	Jun. 30, 2013 Subsequent Event [Member] Brinderson LP [Member]	Jul. 31, 2013 Subsequent Event [Member] New Credit Facility [Member] Revolving Credit Facility [Member]	Jul. 31, 2013 Subsequent Event [Member] New Credit Facility [Member] Term Loan Facility [Member]	Jul. 31, 2013 Subsequent Event [Member] New Credit Facility [Member]	Jun. 30, 2014 Subsequent Event [Member] New Credit Facility [Member]	Jul. 31, 2013 Subsequent Event [Member] Old Credit Facility [Member]	Jul. 31, 2013 Subsequent Event [Member] Maximum Potential Additional Borrowings [Member]	Jul. 31, 2013 Subsequent Event [Member]	Sep. 30, 2013 Subsequent Event [Member]	Jul. 31, 2013 Subsequent Event [Member] Minimum [Member] New Credit Facility [Member]	Aug. 31, 2011 Minimum [Member]	Jul. 31, 2013 Maximum [Member] New Credit Facility [Member]	Aug. 31, 2011 Maximum [Member]
Note 11 - Subsequent Events (Details) [Line Items]
Business Combination, Consideration Transferred	$ 40,144,000				$ 150,000,000
Line of Credit Facility, Maximum Borrowing Capacity			250,000,000			300,000,000	350,000,000	650,000,000		500,000,000	250,000,000
Debt Instrument, Term						5 years	5 years
Proceeds from Lines of Credit		26,000,000						35,500,000
Repayments of Lines of Credit												232,300,000
Payments to Acquire Businesses, Gross				7,000,000
Noninterest Expense Investment Advisory Fees													2,300,000
Payments of Financing Costs													2,600,000
Debt Instrument, Basis Spread on Variable Rate														1.25%	1.50%	2.25%	2.50%
Debt Instrument, Interest Rate, Stated Percentage								2.20%
Derivative, Notional Amount												$ 175,000,000
Monthly Payment, Percentage												0.87%
Credit Facility Maximum Consolidated Leverage Ratio								3.75	3.50
Credit Facility Minimum Consolidated Fixed Charge Ratio								1.25