Stock-Based Compensation Plans (Stock Option Plan) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-Based Compensation Plans [Abstract]
Number of shares, options outstanding, beginning of year	95	121	127
Number of shares, granted	0	0	0
Number of shares, exercised	8	18	6
Number of shares, forfeited	0	8	0
Number of shares, expired	0	0	0
Number of shares, options outstanding, end of year	87	95	121
Number of shares, options exercisable	87	51	34
Weighted average exercise price per share, options outstanding, beginning of year	$ 22.87	$ 22.81	$ 22.82
Weighted average exercise price per share, granted	$ 0.00	$ 0.00	$ 0.00
Weighted average exercise price per share, exercised	$ 22.07	$ 22.81	$ 22.93
Weighted average exercise price per share, forfeited	$ 0.00	$ 22.07	$ 0.00
Weighted average exercise price per share, expired	$ 0.00	$ 0.00	$ 0.00
Weighted average exercise price per share, options outstanding, end of year	$ 22.95	$ 22.87	$ 22.81
Weighted average exercise price per share, options exercisable	$ 22.95	$ 23.57	$ 24.01

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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