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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Factors Used in Computation of Earnings Per Share

The factors used in the earnings per share computation follow:

			Year Ended December 31,
(Dollars in thousands)			2021						2020						2019
Basic
Net income to common stockholders			$	109,768					$	62,323					$	58,544
Weighted average common shares outstanding			24,736,713						24,387,932						25,941,395
Basic earnings per common share			$	4.44					$	2.56					$	2.26
Diluted
Net income to common stockholders			$	109,768					$	62,323					$	58,544
Weighted average common shares outstanding			24,736,713						24,387,932						25,941,395
Dilutive effects of:
Assumed exercises of stock options			130,198						64,104						63,808
Restricted stock awards			170,276						86,498						47,242
Restricted stock units			76,049						25,978						3,441
Performance stock units - market based			136,199						51,304						4,119
Performance stock units - performance based			—						—						—
Employee stock purchase plan			2,617						—						—
Average shares and dilutive potential common shares			25,252,052						24,615,816						26,060,005
Diluted earnings per common share			$	4.35					$	2.53					$	2.25

Schedule of Shares not Considered in Computing Diluted Earnings per Common Share

Shares that were not considered in computing diluted earnings per common share because they were antidilutive or have not met the thresholds to be considered in the dilutive calculation are as follows:

			Year Ended December 31,
			2021						2020						2019
Stock options			16,939						64,947						66,019
Restricted stock awards			8,463						—						—
Restricted stock units			15,000						—						—
Performance stock units - market based			—						—						55,228
Performance stock units - performance based			259,383						256,625						254,000
Employee stock purchase plan			—						—						—

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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=124432515&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://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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