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Share Repurchase Program Share Repurchase Program (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 31, 2019	Oct. 25, 2017	Feb. 25, 2016
Related Party Transaction [Line Items]
Authorized amount				$ 25,000,000	$ 40,000,000.0	$ 25,000,000.0
Authorized amount, additional					$ 15,000,000.0
Treasury stock acquired, shares	400,000	1,101,969	574,054
Payments for repurchase of equity	$ 7,800,000	$ 17,700,000	$ 14,000,000
Average cost per share (in usd per share)	$ 19.39	$ 16.03	$ 24.35
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 25,600,000

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Stock Repurchase Program, Authorized Amount, Additional

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- Definition

The cash outflow to reacquire common and preferred stock.

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-Publisher FASB
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-Topic 230
-SubTopic 10
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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 45
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Number of shares that have been repurchased during the period and are being held in treasury.

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