Note 8 - Leases and Commitments (Tables)

6 Months Ended

Jun. 30, 2014

Leases [Abstract]

Schedule of Capital Leased Assets [Table Text Block]

	(in thousands)
	Capitalized Costs		Accumulated Amortization		Net Book Value
June 30, 2014	$	79,042	$	23,673	$	55,369
December 31, 2013		84,410		20,942		63,468

Condensed Cash Flow Statement [Table Text Block]

	(in thousands)
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Amortization of leased assets	$	3,156	$	2,707	$	6,587	$	5,557
Rent expense under operating leases		1,240		709		2,514		1,622

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

	(in thousands)
	2014		2015		2016		2017		2018		Thereafter
Future minimum payments	$	22,747	$	18,080	$	12,294	$	1,106	$	1,646	$	--
Future rentals under operating leases		1,293		642		520		467		274		166