Stock Options and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Stock Options and Incentive Plans [Abstract]

Schedule of Stock Option Activity

Activity with respect to these plans is as follows: 

	2015	2014	2013
Shares under option January 1	187,233	228,533	507,313
Options canceled	-	-	-
Options exercised	98,460	41,300	278,780
Shares under option at December 31	88,773	187,233	228,533
Options exercisable at December 31	88,773	187,233	228,533

The weighted average exercise price is as follows:

	2015	2014	2013
Shares under option January 1	$18.99	$18.94	$19.45
Options canceled	-	-	-
Options exercised	19.27	18.71	19.87
Shares under option December 31	18.67	18.99	18.94
Options exercisable December 31	18.67	18.99	18.94

Schedule of Executive Management Share-based Compensation Activity

	Number of shares	Weighted average grant date value per share	Year-end intrinsic value (000's)
Shares potentially payable at January 1, 2013	229,361	$24.13	$5,202
Forfeitures	-	-
Payments	(118,364)	$23.05
Shares accrued based on 2013 performance	74,567	$31.62
Shares potentially payable at December 31, 2013	185,564	$27.51	$6,667
Forfeitures	-	-
Payments	(75,385)	$28.60
Shares accrued based on 2014 performance	75,020	$34.65
Shares potentially payable at December 31, 2014	185,199	$30.69	$5,683
Forfeitures	-	-
Payments	(95,889)	$29.09
Shares accrued based on 2015 performance	98,998	$38.01
Shares potentially payable at December 31, 2015	188,308	$35.35	$6,657

Schedule of Other Management Share-based Compensation Activity

	Number of shares	Weighted average value per share	Cash paid for share based liabilities(000's)
Share units potentially payable at January 1, 2013	350,760
Grants	104,554
Payments	(85,902)	$32.71	$2,810
Forfeitures	(8,223)
Share units potentially payable at December 31, 2013	361,189
Grants	91,631
Changes due to performance	(8,793)
Payments	(86,840)	$35.01	$3,040
Forfeitures	(9,246)
Share units potentially payable at December 31, 2014	347,941
Grants	90,065
Changes due to performance	13,966
Payments	(167,482)	$36.08	$6,040
Forfeitures	(31,624)
Share units potentially payable at December 31, 2015	252,866