Basis of Presentation (Tables)

9 Months Ended

Sep. 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 nine-month periods ended September 30, 2018, and 2017, are shown in the table below:

	Three Months Ended September 30,
(Dollars and number of shares in thousands, except per share data)	2018			2017
Net income	$	33,710		$	21,632
Preferred dividends	(13		)	(13		)
Interest expense on convertible preferred debt	—			3
Net income available to common stockholders	$	33,697		$	21,622
Weighted average common shares outstanding for basic earnings per share	34,452			29,648
Assumed incremental common shares issued upon vesting of outstanding restricted stock units	192			262
Weighted average common shares for diluted earnings per share	34,644			29,910
Earnings per common share — basic	$	0.98		$	0.73
Earnings per common share — diluted	$	0.97		$	0.72
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)	2018			2017
Net income	$	84,857		$	61,600
Preferred dividends	(39		)	(45		)
Interest expense on convertible preferred debt	—			12
Net income available to common stockholders	$	84,818		$	61,567
Weighted average common shares outstanding for basic earnings per share	32,520			27,569
Assumed incremental common shares issued upon vesting of outstanding restricted stock units	187			265
Weighted average common shares for diluted earnings per share	32,707			27,834
Earnings per common share — basic	$	2.61		$	2.23
Earnings per common share — diluted	$	2.59		$	2.21
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, 2018, and 2017, and changes during the nine months ended September 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	116,297		55.26		109,071		47.21
Vested	(127,429	)	32.70		(136,428	)	26.66
Forfeited	(27,678	)	45.58		(12,923	)	31.57
Outstanding at September 30	262,768		$	43.65	306,537		$	34.72

Summary of Status of Stock Options

A summary of the stock options outstanding as of September 30, 2018 and 2017, and changes during the nine months ended September 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		(13,650	)	18.60
Forfeited	—		—		(500	)	18.60
Outstanding at September 30	—		$	—	12,250		$	18.60
Options exercisable at September 30	—		$	—	12,250		$	18.60