Stock Options and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock Option Activity

Activity with respect to these plans is as follows:

	2018		2017		2016
Shares under option January 1		29,340		62,390		88,773
Options canceled		-		150		-
Options exercised		10,400		32,900		26,383
Shares under option at December 31		18,940		29,340		62,390
Options exercisable at December 31		18,940		29,340		62,390

The weighted average exercise price is as follows:

	2018		2017		2016
Shares under option January 1		$18.40		$18.28		$18.67
Options canceled		-		20.63		-
Options exercised		19.38		18.16		19.60
Shares under option December 31		17.87		18.40		18.28
Options exercisable December 31		17.87		18.40		18.28

Schedule of Executive Management Share-based Compensation Activity

As of December 31, 2018, there were 1,146,440 shares of Company stock authorized for the payment of awards under these plans. Information with respect to these plans is presented below:

	Number of shares			Weighted average grant date value per share		Year-end intrinsic value (000's)
Shares potentially payable at January 1, 2016		188,308			$35.35		$6,657
Forfeitures		-			-
Payments		(86,926	)		$33.43
Shares accrued based on 2016 performance		88,036			$36.78
Shares potentially payable at December 31, 2016		189,418			$36.90		$6,989
Forfeitures		-			-
Payments		(75,545	)		$36.35
Shares accrued based on 2017 performance		43,532			$48.26
Shares potentially payable at December 31, 2017		157,405			$40.30		$6,343
Forfeitures		-
Payments		(79,762	)		$39.90
Shares accrued based on 2018 performance		34,822			$70.59
Shares potentially payable at December 31, 2018		112,465			$49.96		$5,619

Schedule of Other Management Share-based Compensation Activity

The determination of compensation expense for other management share-based compensation plans is based on the number of outstanding share units, the end-of-period share price, and Company performance. Information with respect to these plans is presented below:

	Number of shares			Weighted average value per share		Cash paid for share based liabilities  (000's)
Share units potentially payable at January 1, 2016		252,866
Grants		118,279
Changes due to performance		18,779
Payments		(88,073	)		$33.20		$2,924
Forfeitures		(40,706	)
Share units potentially payable at December 31, 2016		261,145
Grants		96,505
Changes due to performance		(11,891	)
Payments		(89,190	)		$46.64		$4,160
Forfeitures		(20,473	)
Share units potentially payable at December 31, 2017		236,096
Grants		65,370
Changes due to performance		14,343
Payments		(75,545	)		$62.69		$4,736
Forfeitures		(12,963	)
Share units potentially payable at December 31, 2018		227,301