Note 12 - Insurance Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Balance at beginning of period	$ 46,379	$ 50,015	$ 45,811	$ 50,470
Expense provisions	1,946	1,576	3,334	2,849
Cash payments, net of recoveries	(1,425)	(2,702)	(2,245)	(4,430)
Adjustments		(1,500)		(1,500)
Balance at end of period	$ 46,900	$ 47,389	$ 46,900	$ 47,389