CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2013	$ 175,074	$ 174,719	$ 81,515	$ (41,665)	$ (39,495)
Balance, shares at Dec. 31, 2013		50,339,089
Net income	50,206		50,206
Other comprehensive income (loss)	21,667			21,667
Stock option exercises, value	172		(701)		873
Stock option exercises, shares		85,000
Stock option expense	25	$ 25
Restricted stock grants, value		$ (988)	(1,640)		2,628
Restricted stock grants, shares		254,541
Restricted stock forfeitures, value	(101)	$ 147	133		(381)
Restricted stock forfeitures, shares		(76,126)
Restricted stock expense	482	$ 482
Cash dividend payments	(1,001)		(1,001)
Treasury stock purchases	(6,389)				(6,389)
Treasury stock purchases, shares		(1,363,500)
Balance at Dec. 31, 2014	240,135	$ 174,385	128,512	(19,998)	(42,764)
Balance, shares at Dec. 31, 2014		49,239,004
Net income	16,282		16,282
Other comprehensive income (loss)	778			778
Stock option exercises, value	28		(95)		123
Stock option exercises, shares		14,200
Stock option expense	24	$ 24
Restricted stock grants, value		$ (867)	(524)		1,391
Restricted stock grants, shares		162,711
Restricted stock forfeitures, value	(56)	$ 6	13		(75)
Restricted stock forfeitures, shares		(11,954)
Restricted stock expense	756	$ 756
Cash dividend payments	(3,369)		(3,369)
Treasury stock purchases	(10,333)				(10,333)
Treasury stock purchases, shares		(1,886,317)
Balance at Dec. 31, 2015	244,245	$ 174,304	140,819	(19,220)	(51,658)
Balance, shares at Dec. 31, 2015		47,517,644
Net income	18,828		18,828
Other comprehensive income (loss)	(1,820)			(1,820)
Stock option exercises, value	$ 517		(983)		1,500
Stock option exercises, shares	199,905	199,905
Stock option expense	$ 9	$ 9
Restricted stock grants, value		$ (1,214)	(330)		1,544
Restricted stock grants, shares		200,856
Restricted stock forfeitures, value		$ 13	14		(27)
Restricted stock forfeitures, shares		(2,928)
Restricted stock expense	970	$ 970
Tax benefit of stock option exercises and restricted stock vesting	278	$ 278
Purchase of James & Sons Insurance	1,547		(501)		2,048
Purchase of James & Sons Insurance, shares		262,705
Cash dividend payments	(5,172)		(5,172)
Treasury stock purchases	(9,596)				(9,596)
Treasury stock purchases, shares		(1,596,812)
Balance at Dec. 31, 2016	$ 249,806	$ 174,360	$ 152,675	$ (21,040)	$ (56,189)
Balance, shares at Dec. 31, 2016		46,581,370