Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2015

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

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

The following table summarizes the Company’s stock option activity for the six month period ended June 30, 2015:

 

					Weighted
			Weighted		Average
			Average		Remaining	Aggregate
			Exercise		Contractual	Intrinsic
	Shares		Price		Term (Years)	Value*
Outstanding at December 31, 2014		1,355,416	$	25.36
Exercised		(130,491)	$	19.26
Forfeited or expired		(10,000)	$	26.72
Outstanding at June 30, 2015		1,214,925	$	26.01	3.7	$	4,633,000
Exercisable at June 30, 2015		472,018	$	24.86	2.4	$	2,339,000

* The aggregate intrinsic value of outstanding and exercisable stock options is defined as the difference between the closing price of the Company's stock on June 30, 2015, the last trading day of the quarter, of $29.82 and the exercise price multiplied by the number of in-the-money outstanding and exercisable stock options.

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

The following table summarizes the Company’s stock option exercise activity for the three and six months ended June 30, 2015 and 2014:

 

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
	(Dollars in thousands)
Total intrinsic value of stock options exercised	$	101	$	59	$	1,158	$	96
Cash received from stock option exercises	$	363	$	443	$	2,512	$	608
Income tax benefit from the exercise of stock options	$	39	$	24	$	451	$	37

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

The following table summarizes the Company’s restricted stock award activity for the six-month period ended June 30, 2015:

 

					Weighted
			Weighted		Average
	Shares of		Average		Remaining	Aggregate
	Restricted		Grant Date		Contractual	Intrinsic
	Stock		Fair Value		Term (Years)	Value*
Non-vested at December 31, 2014		54,050	$	26.58
Issued		-		-
Vested		-		-
Forfeited		-		-
Non-vested at June 30, 2015		54,050	$	26.58	2.4	$	1,612,000

* The aggregate intrinsic value of non-vested restricted stock was calculated using the closing price of the Company's stock on June 30, 2015, the last trading day of the quarter, of $29.82 multiplied by the number of non-vested restricted shares outstanding.