Note 2 - Unaudited Pro Forma Results (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Hoak and SJL [Member]
Revenue (less agency commissions)		$ 565,251	$ 445,443
Net income		$ 50,771	$ 20,665
Basic net income per share (in dollars per share)		$ 0.88	$ 0.36
Diluted net income per share (in dollars per share)		$ 0.87	$ 0.36
Revenue (less agency commissions)	$ 621,530	$ 559,538
Net income	$ 46,181	$ 59,342
Basic net income per share (in dollars per share)	$ 0.68	$ 1.03
Diluted net income per share (in dollars per share)	$ 0.67	$ 1.02