Note 21 - Subsequent Events (Details) - USD ($) $ in Thousands, shares in Millions		3 Months Ended																12 Months Ended
	Jan. 27, 2017	Dec. 31, 2016		Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015		Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Subsequent Event [Line Items]
Loss on induced conversion and debt extinguishment		$ 0	[1]	$ (17,397)		$ (2,108)		$ (55,570)		$ (2,320)	[1]	$ (11)		$ (91,876)		$ 0		$ (75,075)	$ (94,207)	[1]	$ 0
Convertible Debt [Member]
Subsequent Event [Line Items]
Repayments of Convertible Debt																		235,000
Loss on induced conversion and debt extinguishment																		(17,200)
Convertible Debt [Member] | Convertible Senior Notes Due 2019
Subsequent Event [Line Items]
Long-term Debt, Gross		$ 68,024								$ 389,992								$ 68,024	$ 389,992
Convertible Debt [Member] | Convertible Senior Notes Due 2019 | Subsequent Event [Member]
Subsequent Event [Line Items]
Repayments of Convertible Debt	$ 110,100
Loss on induced conversion and debt extinguishment	$ (4,500)
Debt Conversion, Converted Instrument, Shares Issued	6.4

[1] For all periods presented, reflects changes to align our segment reporting structure with recent changes in personnel reporting lines and management oversight related to contract underwriting performed on behalf of third parties. Revenue and expenses for this business are now reflected in the Services segment. As a result, for all periods presented, Services revenue and cost of services have increased, with offsetting reductions in other operating expenses.