Note 4 - Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property and equipment, gross	$ 114,560	$ 116,628
Accumulated depreciation and amortization	(74,076)	(71,203)
Total property and equipment, net	40,484	45,425
Leasehold Improvements [Member]
Property and equipment, gross	17,847	17,064
Software and Software Development Costs [Member]
Property and equipment, gross	41,269	41,902
Furniture and Fixtures [Member]
Property and equipment, gross	26,570	28,734
Computer Equipment [Member]
Property and equipment, gross	$ 28,874	$ 28,928