Note 10 - Derivative Financial Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 100,000	$ 100,000	$ 100,000	$ 100,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	2,100,000	8,500,000	2,100,000	8,500,000
Derivative, Amount of Hedged Item	175,000,000		175,000,000
Derivative, Fixed Interest Rate Percentage	0.87%		0.87%
2011 Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative Asset, Notional Amount	83,000,000		83,000,000
2013 Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative Asset, Notional Amount	175,000,000		175,000,000
Cash Flow Hedging [Member]
Debt Instrument [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 100,000		$ 100,000