Equity-Based Compensation (Summary of Stock Option Transactions) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Options (in shares):
Balance at	622,124	711,624	770,499
Exercised	(52,805)	(59,750)	(27,500)
Forfeited		(29,750)	(31,375)
Balance at	569,319	622,124	711,624
Weighted Average Exercise Price (in dollars per share)
Balance at	$ 15.48	$ 14.97	$ 14.74
Exercised	$ 11.18	$ 11.00	$ 9.70
Forfeited		$ 12.38	$ 13.76
Balance at	$ 15.88	$ 15.48	$ 14.97
Weighted Average Remaining Contractual Life (in years)	4 years
Aggregate Intrinsic Value	$ 1,393

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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-SubTopic 10

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

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

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