Note 10 - Long-Term Debt (Details)	0 Months Ended		6 Months Ended	12 Months Ended	24 Months Ended								6 Months Ended		6 Months Ended				6 Months Ended			6 Months Ended					3 Months Ended		3 Months Ended
	Jul. 19, 2011 USD ($)	May 06, 2011 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Jul. 15, 2015	Dec. 31, 2012 USD ($)	Jan. 15, 2012	Jul. 31, 2011	Jul. 07, 2011 USD ($)	Feb. 09, 2011 USD ($)	Nov. 02, 2010 USD ($)	Jun. 30, 2013 UKIM [Member]	Sep. 29, 2010 UKIM [Member] GBP (£)	Jun. 30, 2013 Premex Group [Member]	May 12, 2011 Premex Group [Member] GBP (£)	Jun. 30, 2013 UKIM [Member] USD ($)	Jun. 30, 2013 Premex Group [Member] USD ($)	Jun. 30, 2013 Federal Funds Rate Base [Member]	Jun. 30, 2013 LIBOR Rate Base [Member]	Jun. 30, 2013 Default Rate [Member]	Jun. 30, 2013 UKIM June 2013 Amendment Letter [Member]	Jun. 30, 2013 Premex June 2013 Amendment Letter [Member]	Dec. 31, 2010 Subordinated Unsecured Notes [Member] USD ($)	Dec. 31, 2010 Noninterest Bearing [Member] USD ($)	Dec. 31, 2010 Minimum [Member] Noninterest Bearing [Member] USD ($)	Sep. 30, 2011 Minimum [Member] USD ($)	Dec. 31, 2010 Maximum [Member] Noninterest Bearing [Member] USD ($)	Sep. 30, 2011 Maximum [Member] USD ($)
Note 10 - Long-Term Debt (Details) [Line Items]
Senior Notes	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage	9.00%							9.00%	9.00%												2.00%			6.00%
Proceeds from Issuance of Senior Long-term Debt	250,000,000
Debt Instrument Repurchase Percentage of Face Amount						101.00%
Line of Credit Facility, Maximum Borrowing Capacity		300,000,000								262,500,000	245,000,000	180,000,000		5,000,000		26,500,000
Line of Credit Facility, Increase (Decrease), Other, Net		55,000,000
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases		50,000,000								75,000,000
Line Of Credit Facility Increase Right				37,500,000
Line Of Credit Facility Increase Capacity										300,000,000
Secured Revolving Credit Facility, Alternative Currency Sublimit				60,000,000			100,000,000
Debt Instrument, Basis Spread on Variable Rate			2.40%										2.50%		2.40%				0.50%	1.00%
Line of Credit Facility, Amount Outstanding			78,000,000														7,000,000	22,300,000
Line of Credit Facility, Remaining Borrowing Capacity			184,500,000														643,000	18,000,000
Debt Instrument, Interest Rate at Period End													0.50%		0.50%
Debt Instrument, Term																						24 months	24 months
Business Combination, Consideration Transferred, Liabilities Incurred					6,900,000
Notes Payable																								4,400,000	2,500,000
Debt Instrument, Periodic Payment																											50,000		76,000
Debt Instrument, Annual Principal Payment																										$ 250,000		$ 750,000