Note 9 - Leases and Commitments (Tables)

12 Months Ended

Dec. 31, 2013

Leases [Abstract]

Schedule of Capital Leased Assets [Table Text Block]

	(in thousands)
	Capitalized Costs		Accumulated Amortization		Net Book Value
December 31, 2013	$	84,410	$	20,942	$	63,468
December 31, 2012		67,788		16,366		51,422

Condensed Cash Flow Statement [Table Text Block]

	(in thousands)
	Year Ended December 31,
	2013		2012
Amortization of leased assets	$	12,667	$	10,745
Rent expense under operating leases		2,778		3,148

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

	(in thousands)
	2014		2015		2016		2017		2018		Thereafter
Future minimum payments	$	20,133	$	23,090	$	14,557	$	6,264	$	2,118	$	--
Future rentals under operating leases		1,195		408		297		281		135		168