Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Earnest Money Deposits	$ 6,400	$ 8,800
Contract with Customer, Asset, Net, Total	34,800			$ 32,600
Depreciation, Depletion and Amortization, Total	20,500	4,500	$ 4,600
Goodwill, Impairment Loss	0	0
Derivative, Notional Amount	65,500	73,000
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	17,800	33,400
Derivative, Gain (Loss) on Derivative, Net, Total	400	(1,700)	1,500
Gain (Loss) on Sale of Mortgage Loans	41,600	39,000	$ 34,000
Interest Rate Lock Commitments [Member]
Derivative, Notional Amount	$ 101,100	$ 66,600
Derivative, Average Fixed Interest Rate	4.78%	4.15%
Minimum [Member]
Property, Plant and Equipment, Useful Life	2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	29 years