Note 10 - Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2014

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

	December 31,		June 30,
	2013		2014
	(in thousands)
Senior Unsecured Notes Payable (a)	$	250,000	$	250,000
Senior Secured Revolving Credit Facility, Bank of America, N.A. (b)		45,027		187,022
Working capital facilities, Barclays (c)		37,943		40,410
Various subordinated unsecured notes payable; maturing at various dates from 2011 through 2014 (d)		318		—
		333,288		477,432
Less current portion		318		40,410
	$	332,970	$	437,022

Schedule of Guarantor Obligations [Table Text Block]

Pricing Tier		Consolidated Senior Secured Leverage Ratio									Commitment Fee/Unused Line Fee		Letter of Credit Fee		Eurocurrency Rate Loans		Base Rate Loans
	1	≥	2.50	to	1.0							0.50%		3.75%		3.75%		2.75%
	2	≥	2.00	to	1.0	but	<	2.50	to	1.0		0.45%		3.50%		3.50%		2.50%
	3	≥	1.50	to	1.0	but	<	2.00	to	1.0		0.40%		3.25%		3.25%		2.25%
	4	≥	1.00	to	1.0	but	<	1.50	to	1.0		0.35%		3.00%		3.00%		2.00%
	5						<	1.00	to	1.0		0.30%		2.75%		2.75%		1.75%

Schedule of Maturities of Long-term Debt [Table Text Block]

	Amount
Six months ended December 31, 2014	$	—
Year ended December 31:
2015		40,410
2016		187,022
2017		—
2018		—
Thereafter		250,000
Total	$	477,432