Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

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 six-month periods ended June 30, 2018, and 2017, are shown in the table below:

	Three Months Ended June 30,
(Dollars and number of shares in thousands, except per share data)	2018			2017
Net income	$	27,879		$	21,958
Preferred dividends	(13		)	(13		)
Interest expense on convertible preferred debt	—			4
Net income available to common stockholders	$	27,866		$	21,949
Weighted average common shares outstanding for basic earnings per share	32,621			26,687
Assumed incremental common shares issued upon exercise of stock options and non-vested restricted stock units	210			286
Weighted average common shares for diluted earnings per share	32,831			26,973
Earnings per common share — basic	$	0.85		$	0.82
Earnings per common share — diluted	$	0.85		$	0.81
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation	—			—
	Six Months Ended June 30,
(Dollars and number of shares in thousands, except per share data)	2018			2017
Net income	$	51,147		$	39,968
Preferred dividends	(26		)	(32		)
Interest expense on convertible preferred debt	—			9
Net income available to common stockholders	$	51,121		$	39,945
Weighted average common shares outstanding for basic earnings per share	31,537			26,512
Assumed incremental common shares issued upon non-vested restricted stock units	209			286
Weighted average common shares for diluted earnings per share	31,746			26,798
Earnings per common share — basic	$	1.62		$	1.51
Earnings per common share — diluted	$	1.61		$	1.49
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 June 30, 2018 and 2017, and changes during the six months ended June 30, 2018 and 2017, follows:

	2018				2017
	Shares		Weighted-Average Grant Date Fair Value		Shares		Weighted-Average Grant Date Fair Value
Outstanding at January 1	301,578		$	34.74	346,817		$	27.61
Granted	113,738		55.16		108,245		47.21
Vested	(124,764	)	32.64		(125,840	)	26.32
Forfeited	(25,011	)	45.50		(10,563	)	31.78
Outstanding at June 30	265,541		$	43.49	318,659		$	34.64

Summary of Status of Stock Options

A summary of the stock options outstanding as of June 30, 2018 and 2017, and changes during the six months ended June 30, 2018 and 2017, follows:

	2018				2017
	Shares		Weighted-Average Exercise Price		Shares		Weighted-Average Exercise Price
Outstanding at January 1	6,500		$	18.60	26,400		$	18.60
Granted	—		—		—		—
Exercised	(6,500	)	18.60		(8,250	)	18.60
Forfeited	—		—		(500	)	18.60
Outstanding at June 30	—		$	—	17,650		$	18.60
Options exercisable at June 30	—		$	—	17,650		$	18.60