Equity-Based Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Number of shares:
Balance options outstanding, end	277,679
Stock Options [Member]
Weighted Average Exercise Price
Balance, beginning	$ 17.75
Expired	$ 21.22
Outstanding	$ 16.11
Exercisable	$ 18.46
Number of shares:
Balance options outstanding, beginning	408,408
Expired	(130,729)
Balance options outstanding, end	277,679
Exercisable, end of period	202,679
Weighted- Average Contractual Term (years), outstanding	4 years 6 months
Weighted- Average Contractual Term (years), exercisable	3 years 1 month 6 days
Aggregate Intrinsic Value, outstanding	$ 856,677
Aggregate Intrinsic Value, exercisable	$ 227,802

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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-Publisher FASB

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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 grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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