Note 6 - Senior Notes, Credit Facilities and Capital Leases (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

	Previous Facility			New Facility
Interest rates:
Spread over the London Interbank Offer Rate	3.00	-	4.50%	2.25	-	3.25%
Spread over alternative base rate	2.00	-	3.50%	1.25	-	2.25%
Standby fee per annum on undrawn amounts	0.825	-	1.05%		0.50%

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

Twelve-month period ending December 31,
2014	$	9,011
2015		7,887
2016		5,201
2017		1,734
Total		23,833
Less: imputed interest		(1,093	)
Net capital lease obligation	$	22,740