Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Minimum [Member]
Short Term Borrowings Maturity Period (Day)	30 days
Financial Services Segment [Member]
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance	$ 133,921		$ 197,021
Gain (Loss) on Sale of Mortgage Loans	16,700	$ 11,700
Fair Value, Inputs, Level 2 [Member] | Under Commitment to Sell [Member]
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance	88,100		136,800
Fair Value, Inputs, Level 2 [Member] | Not Under Commitment to Sell [Member]
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance	$ 45,800		$ 60,200