Employee Incentive, Deferred Compensation, And Retirement Plans (Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Employee Incentive, Deferred Compensation, And Retirement Plans [Abstract]
Oustanding Options, Beginning balance	160
Exercised, Options	(34)
Outstanding Options, Ending balance	126
Outstanding, Weighted-average exercise price, Beginning balance	$ 26.99
Exercised, Weighted-average exercise price	$ 48.10
Outstanding, Weighted-average exercise price, Ending balance	$ 31.61
Outstanding, Weighted-average remaining contractual term	2 years 29 days
Outstanding, Aggregate intrinsic value	$ 3,256

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Number of options outstanding, including both vested and non-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 remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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

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