CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance at Dec. 31, 2014	$ 1,071	$ 391,877	$ 431,825	$ (783)	$ (98,439)	$ 725,551
Net earnings			19,307			19,307
Other comprehensive loss, net				(2,067)		(2,067)
Adjustment to treasury stock for holdings in investment partnerships					(255,272)	(255,272)
Exercise of stock options		(24)			246	222
Balance at Sep. 30, 2015	1,071	391,853	451,132	(2,850)	(353,465)	487,741
Balance at Dec. 31, 2015	1,071	391,853	415,982	(3,679)	(353,855)	451,372
Net earnings			28,551			28,551
Other comprehensive loss, net				761		761
Adjustment to treasury stock for holdings in investment partnerships					(19,807)	(19,807)
Exercise of stock options		(8)			10	2
Balance at Sep. 30, 2016	$ 1,071	$ 391,845	$ 444,533	$ (2,918)	$ (373,652)	$ 460,879