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Earnings Per Common Share (Narrative) (Details) - shares	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Treasury Stock, Shares, Acquired	0	76,000	250,000	86,650
Stock Issued During Period, Shares, Acquisitions	0	0	1,037,205	0		1,037,205
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Treasury Stock, Shares, Acquired	0		250,000		76,000	336,650
Performance Shares [Member] | Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	0		0		62,265	58,740
Restricted Stock Units (RSUs) [Member] | Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			15,700

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Number of shares issued under share-based payment arrangement.

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Number of shares of stock issued during the period pursuant to acquisitions.

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