Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Amounts used in the determination of basic and diluted earnings per share for the three- and nine-month periods ended September 30, 2017 and 2016, are shown in the table below:

	Three Months Ended September 30,
(Dollars and number of shares in thousands, except per share data)	2017			2016
Net income	$	21,632		$	20,208
Preferred dividends and discount	(13		)	(53		)
Interest expense on convertible preferred debt	3			17
Net income available to common stockholders	$	21,622		$	20,172
Weighted average common shares outstanding for basic earnings per share	29,648			24,601
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units	262			322
Weighted average common shares for diluted earnings per share	29,910			24,923
Earnings per common share — basic	$	0.73		$	0.82
Earnings per common share — diluted	$	0.72		$	0.81
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	—			—
	Nine Months Ended September 30,
(Dollars and number of shares in thousands, except per share data)	2017			2016
Net income	$	61,600		$	61,187
Preferred dividends	(45		)	(273		)
Interest expense on convertible preferred debt	12			48
Net income available to common stockholders	$	61,567		$	60,962
Weighted average common shares outstanding for basic earnings per share	27,569			24,262
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units	265			319
Weighted average common shares for diluted earnings per share	27,834			24,581
Earnings per common share — basic	$	2.23		$	2.51
Earnings per common share — diluted	$	2.21		$	2.48
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	—			—

Summary of Status of RSUs

A summary of the RSUs outstanding as of September 30, 2017 and 2016, and changes during the nine months ended September 30, 2017 and 2016, follows:

	2017				2016
	Shares		Weighted-Average Grant Date Fair Value		Shares		Weighted-Average Grant Date Fair Value
Outstanding at January 1	346,817		$	27.61	353,195		$	25.53
Granted	109,071		47.21		143,721		29.75
Vested	(136,428	)	26.66		(117,898	)	23.44
Forfeited	(12,923	)	31.57		(11,547	)	27.12
Outstanding at September 30	306,537		$	34.72	367,471		$	27.60

Summary of Status of Stock Options

A summary of the stock options outstanding as of September 30, 2017 and 2016, and changes during the nine months ended September 30, 2017 and 2016, follows:

	2017				2016
	Shares		Weighted-Average Exercise Price		Shares		Weighted-Average Exercise Price
Outstanding at January 1	26,400		$	18.60	125,950		$	24.08
Granted	—		—		—		—
Exercised	(13,650	)	18.60		(55,250	)	24.82
Forfeited	(500	)	18.60		(1,500	)	21.10
Outstanding at September 30	12,250		$	18.60	69,200		$	23.55
Options exercisable at September 30	12,250		$	18.60	69,200		$	23.55