Note 21 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Year Ended December 31,
	2018					2017					2016
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number of			Exercise		Number of			Exercise		Number of			Exercise
	Shares			Price		Shares			Price		Shares			Price
Outstanding Stock Option Activity
Outstanding, beginning of year		5,642,623		$	25.22		6,644,274		$	26.14		7,252,380		$	28.17
Granted		450,000			30.73		-			N/A		45,360			20.07
Exercised		(364,418	)		27.06		(380,786	)		24.84		-			N/A
Forfeited		(9,213	)		22.10		-			N/A		(11,340	)		26.28
Cancelled		(187,110	)		30.18		(620,865	)		35.24		(642,126	)		48.61
Outstanding, end of year		5,531,882		$	25.38		5,642,623		$	25.22		6,644,274		$	26.14

Schedule of Nonvested Share Activity [Table Text Block]

	Year Ended December 31,
	2018					2017					2016
				Weighted-					Weighted-					Weighted-
	Number of			Average		Number of			Average		Number of			Average
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Unvested Stock Option Activity
Outstanding, beginning of year		125,445		$	6.22		2,472,911		$	5.10		2,531,700		$	5.21
Granted		450,000			6.83		-			N/A		45,360			3.74
Vested		(118,508	)		6.67		(2,347,466	)		5.03		(91,902	)		7.53
Forfeited		(9,213	)		4.21		-			N/A		(12,247	)		5.40
Unvested, end of year		447,724		$	6.76		125,445		$	6.22		2,472,911		$	5.10

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

Exercisable or expected to vest
Number outstanding		5,124,237
Weighted-average exercise price	$	24.97
Aggregate intrinsic value (in thousands)	$	17,201
Weighted-average remaining contractual term (years)		4.55
Exercisable
Number outstanding		5,084,158
Weighted-average exercise price	$	24.98
Aggregate intrinsic value (in thousands)	$	16,982
Weighted-average remaining contractual term (years)		4.54

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
					Weighted-						Weighted-
					Average						Average
					Remaining		Weighted-				Remaining		Weighted-
					Contractual		Average				Contractual		Average
			Number		Life (in		Exercise		Number		Life (in		Exercise
Range of Exercise Price			Outstanding		years)		Price		Outstanding		years)		Price
$ 15.01	-	$ 20.00		45,090		2.76	$	19.25		45,090		2.76	$	19.25
$ 20.01	-	$ 25.00		1,343,079		3.61		21.72		1,306,223		3.52		21.72
$ 25.01	-	$ 30.00		3,313,823		5.23		25.62		3,302,955		5.23		25.62
$ 30.01	-	$ 35.00		829,890		5.82		30.70		429,890		2.49		30.62
Total				5,531,882		4.90	$	25.38		5,084,158		4.54	$	24.98

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Year Ended December 31,
	2018					2017					2016
				Weighted-					Weighted-					Weighted-
				Average					Average					Average
	Number of			Grant Date		Number of			Grant Date		Number of			Grant Date
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Unvested, beginning of year		293,880		$	25.80		204,753		$	21.44		110,772		$	26.71
Granted		132,606			31.87		148,722			29.61		167,079			22.00
Vested		(108,707	)		27.49		(53,125	)		24.38		(73,098	)		29.01
Forfeited		(4,900	)		31.15		(6,470	)		23.56		-			29.11
Unvested, end of year		312,879		$	27.66		293,880		$	25.80		204,753		$	21.44

Share-based Compensation, Performance Shares Award Outstanding Activity [Table Text Block]

					Threshold Goal			Target Goal			Maximum Goal
Awardee	Date of Award	Performance Period	Base Period	Base Period Revenues	PSUs		Home Sale Revenues	PSUs		Home Sale Revenues	PSUs		Home Sale Revenues	Fair Value per Share		Maximum Potential Expense to be Recognized*
CEO	July 25, 2016	July 1, 2016	July 1, 2015	$1.975		56,700	$2.074		113,400	$2.173		226,800	$2.370			$	4,815
COO		to	to	billion		56,700	billion		113,400	billion		226,800	billion	$	21.23		4,815
CFO		June 30, 2019	June 30, 2016			14,175			28,350			56,700					1,204
																$	10,834
CEO	June 20, 2017	April 1, 2017	April 1, 2016	$2.426		59,400	$2.547		118,800	$2.669		237,600	$2.911			$	7,142
COO		to	to	billion		59,400	billion		118,800	billion		237,600	billion	$	30.06		7,142
CFO		March 31, 2020	March 31, 2017			14,850			29,700			59,400					1,786
																$	16,070
CEO	May 23, 2018	April 1, 2018	April 1, 2017	$2.543		60,000	$2.670		120,000	$2.797		240,000	$3.052			$	6,629
COO		to	to	billion		60,000	billion		120,000	billion		240,000	billion	$	27.62		6,629
CFO		March 31, 2021	March 31, 2018			15,000			30,000			60,000					1,657
_______________________																$	14,915
* Dollars in thousands

Market-Based Awards [Member]

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Expected volatility	27.8	%
Risk free interest rate	2.2	%
Dividend yield rate	3.5	%

Employee Stock Option [Member]

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2018			2017		2016
Expected lives of options (in years)		9.1			N/A		5.0
Expected volatility		29.7	%		N/A		32.1	%
Risk free interest rate		3.0	%		N/A		1.6	%
Dividend yield rate		3.9	%		N/A		4.4	%