Note 6 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Minimum [Member]
Short Term Borrowings Maturity Period			30 days
Financial Services Segment [Member]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Ending Balance	$ 109,337		$ 109,337		$ 149,211
Gain (Loss) on Sale of Mortgage Loans	12,600	$ 10,300	24,300	$ 19,300
Fair Value, Inputs, Level 2 [Member] | Under Commitment to Sell [Member]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Ending Balance	97,300		97,300		130,800
Fair Value, Inputs, Level 2 [Member] | Not Under Commitment to Sell [Member]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Ending Balance	$ 12,000		$ 12,000		$ 18,500