Note 7 - Derivative Financial Instruments (Details) - Derivatives in Fair Value and Cash Flow Hedging Relationships, Three Months Ended (Interest Expense [Member], Derivatives in Cash Flow Hedging Relationships [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps	$ (225)	$ (2,908)