Note 10 - Long-Term Debt (Detail)	0 Months Ended		1 Months Ended		9 Months Ended	12 Months Ended											3 Months Ended		3 Months Ended
	Jul. 19, 2011 USD ($)	May 06, 2011 USD ($)	Feb. 27, 2012	Jul. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)	Jul. 15, 2015	Dec. 31, 2012 USD ($)	Jan. 15, 2012	Jul. 07, 2011 USD ($)	Feb. 09, 2011 USD ($)	Dec. 31, 2010 USD ($)	Nov. 02, 2010 USD ($)	Dec. 31, 2012 UKIM [Member] USD ($)	Dec. 31, 2012 Premex Group [Member] USD ($)	Dec. 31, 2010 Minimum [Member] Noninterest Bearing [Member] USD ($)	Sep. 30, 2011 Minimum [Member] USD ($)	Dec. 31, 2010 Maximum [Member] Noninterest Bearing [Member] USD ($)	Sep. 30, 2011 Maximum [Member] USD ($)	Dec. 31, 2012 Australian Dollars [Member] USD ($)	Dec. 31, 2011 UKIM [Member]	Sep. 29, 2010 UKIM [Member] GBP (£)	Dec. 31, 2011 Premex Group [Member]	May 12, 2011 Premex Group [Member] GBP (£)	Jul. 07, 2011 Federal Funds Rate Base [Member]	Jul. 07, 2011 LIBOR Rate Base [Member]	Jul. 07, 2011 Default Rate [Member]	Dec. 31, 2010 Subordinated Unsecured Notes [Member] USD ($)	Dec. 31, 2010 Noninterest Bearing [Member] USD ($)
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						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		(37,500,000)
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
Line of Credit Facility, Covenant Terms			1.00
Secured Revolving Credit Facility, Alternative Currency Sublimit						60,000,000		100,000,000
Debt Instrument, Basis Spread on Variable Rate																						2.50%		2.40%	0.50%	1.00%
Line of Credit Facility, Amount Outstanding								99,900,000						6,000,000	28,500,000					51,900,000
Line of Credit Facility, Interest Rate at Period End								3.00%
Line of Credit Facility, Remaining Borrowing Capacity								162,600,000						2,100,000	14,400,000
Debt Instrument, Interest Rate at Period End																					0.50%		0.50%
Business Acquisition, Cost of Acquired Entity, 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
Repayments of Long-term Debt					$ 2,200,000