STOCK-BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2014

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The following weighted-average assumptions were used to determine compensation expense related to stock options in 2014, 2013 and 2012:

	2014			2013			2012
Risk-free interest rate		1.45	%		1.10	%		0.51	%
Expected dividend yield		2.81	%		2.53	%		2.89	%
Expected term		4.3 years			4.3 years			4.3 years
Expected volatility		17.8	%		16.2	%		26.4	%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following tables summarize stock option activity under the Company’s plans:

Stock Options

	Years ended December 31,
	2014					2013					2012
Stock Options	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at beginning of year		1,260,866		$	24.41		1,265,792		$	22.76		1,307,488		$	21.76
Granted		331,600			27.04		333,300			28.50		253,400			23.53
Exercised		(218,150	)		22.37		(219,526	)		17.91		(174,646	)		13.17
Forfeited or expired		(18,900	)		25.71		(118,700	)		30.30		(120,450	)		27.37
Outstanding at end of year		1,355,416		$	25.36		1,260,866		$	24.41		1,265,792		$	22.76
Exercisable at end of year		603,834		$	23.66		581,081		$	22.39		706,863		$	21.89
Weighted average fair market value of options granted	$	2.93				$	2.77				$	3.68

 

	Weighted Average Remaining Contractual Life (in Years)		Aggregate Intrinsic Value
Outstanding – December 31, 2014		3.8	$	5,839,000
Exercisable – December 31, 2014		2.4	$	3,631,000

Schedule of Nonvested Share Activity [Table Text Block]

The aggregate intrinsic value of outstanding and exercisable stock options is defined as the difference between the market value of the Company’s stock on December 31, 2014 of $29.67 and the exercise price multiplied by the number of in-the-money outstanding and exercisable stock options.

Non-vested Stock Options

Non-vested Stock Options	Number of Options			Weighted Average Exercise Price		Weighted Average Fair Value
Non-vested – December 31, 2011		485,978		$	24.46	$	4.70
Granted		253,400			23.53		3.68
Vested		(173,824	)		25.05		4.73
Forfeited		(6,625	)		24.26		4.60
Non-vested – December 31, 2012		558,929		$	23.86	$	4.23
Granted		333,300			28.50		2.77
Vested		(207,044	)		23.83		4.42
Forfeited		(5,400	)		23.95		4.28
Non-vested – December 31, 2013		679,785		$	26.14	$	3.46
Granted		331,600			27.04		2.93
Vested		(243,303	)		25.54		3.80
Forfeited		(16,500	)		25.98		3.44
Non-vested – December 31, 2014		751,582		$	26.74	$	3.12

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table summarizes information about outstanding and exercisable stock options at December 31, 2014:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number of Options Outstanding		Weighted Average Remaining Contractual Life (in Years)		Weighted Average Exercise Price		Number of Options Exercisable		Weighted Average Exercise Price
$18.03		105,166		0.32	$	18.03		105,166	$	18.03
$23.53 to $24.49		594,250		2.82		24.01		416,518		24.12
$27.04 to $28.50		656,000		5.29		27.76		82,150		28.50
		1,355,416		3.82	$	25.36		603,834	$	23.66

Schedule of Cash Proceeds Received from Share-based Payment Awards [Table Text Block]

The following table summarizes stock option activity for the years ended December 31:

	2014		2013		2012
	(Dollars in thousands)
Total intrinsic value of stock options exercised	$	1,108	$	1,506	$	1,704
Cash received from stock option exercises	$	4,881	$	3,932	$	2,300
Income tax benefit from the exercise of stock options	$	432	$	588	$	664
Total fair value of stock options vested	$	923	$	915	$	821

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

The following table summarizes restricted stock award activity during the years ended December 31, 2012, 2013 and 2014:

Non-vested Restricted Stock	Shares of Restricted Stock			Weighted Average Grant Date Fair Value
Non-vested – December 31, 2011		38,000		$	24.47
Issued		19,600			23.53
Vested		(15,025	)		24.97
Forfeited		—			—
Non-vested – December 31, 2012		42,575			23.87
Issued		20,400			28.50
Vested		(15,475	)		23.85
Forfeited		—			—
Non-vested – December 31, 2013		47,500		$	25.86
Issued		24,400			27.04
Vested		(17,850	)		25.31
Forfeited		—			—
Non-vested – December 31, 2014		54,050		$	26.58