Note 8 - Leases and Commitments (Details) - Amortization of Leased Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Amortization of Leased Assets [Abstract]
Amortization of leased assets	$ 3,156	$ 2,707	$ 6,587	$ 5,557
Rent expense under operating leases	$ 1,240	$ 709	$ 2,514	$ 1,622