Note 10 - Derivative Financial Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jul. 31, 2013 2011 Interest Rate Swap [Member]	Jul. 31, 2013 2013 Interest Rate Swap [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2014 2013 Credit Facility [Member]	Dec. 31, 2013 2013 Credit Facility [Member]	Jul. 31, 2013 2013 Credit Facility [Member]	Jul. 02, 2013 2013 Credit Facility [Member]
Debt Instrument [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 100,000	$ 100,000
Cash Flow Hedge Derivative Instrument Assets at Fair Value					67,000	24,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	1,000,000	6,500,000
Derivative Asset, Notional Amount			83,000,000	175,000,000
Derivative, Amount of Hedged Item									175,000,000
Secured Debt							$ 336,900,000	$ 341,300,000		$ 350,000,000
Derivative, Fixed Interest Rate Percentage	0.87%