Note 6 - Goodwill and Other Intangible Assets, Net Schedule of Goodwill (Details) - Mortgage and Real Estate Services Segment [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill, Gross, Beginning of Period	$ 197,391	$ 197,265
Goodwill, Acquired During Period	0	126
Goodwill, Gross, End of Period	197,391	197,391
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(186,469)	(2,095)
Goodwill, Impairment Loss	0	(184,374)
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(186,469)	(186,469)
Goodwill, Net	$ 10,922	$ 10,922	$ 195,170