Stock Compensation Plans and Other Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement, Noncash Expense [Abstract]

A summary of the Plans’ stock option activity for the years ended December 31, 2019, 2018 and 2017 is as follows:



Stock Options	Common Shares		Weighted Average Strike Price		Remaining Contractual Term⁽¹⁾	Intrinsic Value⁽²⁾ ($000)
Outstanding at January 1, 2017	1,698,912		$	41.50
Granted	—		—
Exercised	(593,459	)	40.57
Forfeited or canceled	(20,697	)	42.83
Outstanding at December 31, 2017	1,084,756		$	41.98	4.0	$	43,817
Exercisable at December 31, 2017	562,810		$	41.82	3.3	$	22,820
Outstanding at January 1, 2018	1,084,756		$	41.98
Granted	—		—
Exercised	(282,614	)	41.25
Forfeited or canceled	(7,128	)	39.84
Outstanding at December 31, 2018	795,014		$	42.25	3.1	$	19,268
Exercisable at December 31, 2018	613,932		$	42.54	3.1	$	14,705
Outstanding at January 1, 2019	795,014		$	42.25
Granted	—		—
Options outstanding in acquired plans	106,748		38.83
Exercised	(146,430	)	38.84
Forfeited or canceled	—		—
Outstanding at December 31, 2019	755,332		$	42.43	2.8	$	21,503
Exercisable at December 31, 2019	735,396		$	42.42	2.7	$	20,947
Vested or expected to vest at December 31, 2019	755,332		$	42.43	2.8	$	21,503


(1)	Represents the weighted average contractual remaining life in years.

(2)

Aggregate intrinsic value represents the total pretax intrinsic value (i.e., the difference between the Company’s stock price at year end and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the year. Options with exercise prices above the year end stock price are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.

Summary of Plans' Restricted Share Award Activity

A summary of the Plans’ restricted share activity for the years ended December 31, 2019, 2018 and 2017 is as follows:



	2019				2018				2017
Restricted Shares	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	143,263		$	60.80	127,787		$	53.33	133,425		$	49.94
Granted	24,285		68.58		35,654		84.36		16,552		73.16
Vested and issued	(21,529	)	70.99		(18,324	)	54.31		(19,639	)	47.13
Forfeited or canceled	(1,691	)	79.50		(1,854	)	63.50		(2,551	)	52.26
Outstanding at end of year	144,328		$	60.37	143,263		$	60.80	127,787		$	53.33
Vested, but not issuable at end of year	92,183		$	52.24	90,520		$	51.94	89,723		$	51.64

A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the years ended December 31, 2019, 2018 and 2017 is as follows:



	2019				2018				2017
Performance Shares	Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value		Common Shares		Weighted Average Grant-Date Fair Value
Outstanding at January 1	396,855		$	67.71	359,196		$	54.37	298,180		$	43.64
Granted	175,823		71.56		134,380		88.27		145,853		72.60
Added by performance factor at vesting	33,950		40.99		—		—		—		—
Vested and issued	(128,238	)	41.00		(82,307	)	44.39		(68,712	)	46.85
Forfeited or canceled	(12,875	)	75.08		(14,414	)	60.05		(16,125	)	52.98
Outstanding at end of year	465,515		$	74.37	396,855		$	67.71	359,196		$	54.37
Vested, but deferred at year end	33,828		$	43.01	21,530		$	43.54	108,143		$	44.16