Note 12 - Insurance and Construction Defect Claim Reserves - Summary of Insurance and Defect Claim Reserves Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Balance at beginning of period	$ 53,395	$ 51,851	$ 52,686	$ 50,954
Expense provisions	2,733	2,385	5,037	4,501
Cash payments, net of recoveries	(5,421)	(4,589)	(7,016)	(5,808)
Balance at end of period	$ 50,707	$ 49,647	$ 50,707	$ 49,647