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Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Common Share

Basic and diluted net income per common share are calculated as follows:

		Income (Numerator)				Shares (Denominator)				Per Share Amount
		(Dollars in thousands, except per share data)
Year Ended December 31, 2018
Basic
Income available to common stockholders		$	125,814				32,689,228			$	3.85
Effect of stock options			—				741,486
Diluted
Income available to common stockholders plus assumed    exercises of stock options		$	125,814				33,430,714			$	3.76
Year Ended December 31, 2017
Basic
Income available to common stockholders		$	86,439				31,813,572			$	2.72
Effect of stock options			—				754,533
Diluted
Income available to common stockholders plus assumed    exercises of stock options		$	86,439				32,568,105			$	2.65
Year Ended December 31, 2016
Basic
Income available to common stockholders		$	70,674				31,230,340			$	2.27
Effect of stock options			—				592,184
Diluted
Income available to common stockholders plus assumed    exercises of stock options		$	70,674				31,822,524			$	2.22

Average Exercise Price of Options Excluded from Computation of Diluted Net Income Per Common Share

The following table shows the number and average exercise price of options that were excluded from the computation of diluted net income per common share for each year because the options were anti-dilutive for the period.

		Shares				Average Exercise Price
December 31, 2018			92,738			$	53.17
December 31, 2017			55,337				46.86
December 31, 2016			294,438				30.25

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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