Note 9 - Senior Notes, Credit Facilities and Capital Leases (Details) - Credit Facilities (New Facility [Member], USD $)	3 Months Ended
	Mar. 31, 2015
Interest rates:
Standby fee per annum on undrawn amounts	0.50%
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rates:
Spread	2.25%
Minimum [Member] | Base Rate [Member]
Interest rates:
Spread	1.25%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Interest rates:
Spread	3.25%
Maximum [Member] | Base Rate [Member]
Interest rates:
Spread	2.25%
Maximum [Member]
Covenant financial ratios:
Senior leverage ratio (debt secured by liens/EBITDA)	2.50
Leverage ratio (total debt less unencumbered cash/EBITDA)	4.00
Interest coverage ratio (EBITDA/interest expense) (in Dollars)	3.00