Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of Significant Accounting Policies [Abstract]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	80.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 244,000	$ 193,000
Deferred fees	42,000	16,000
Interest paid on deferred fees	17,000	15,000
Life Settlement Contracts, Fair Value Method, Face Value	250,000
Postemployment Benefits, Period Expense	5,000	10,000
Life Settlement Contracts, Period Expense	5,000	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share Based Compensation Arrangement By ShareBased Payment Award Award Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,720,529
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	516,332	643,206	775,468
Share Based Compensation Arrangement By Share Based Payment Award Options Exercised Forfited Or Expired Number	1,097,521
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	106,676
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	25,000	127,000
Allocated Share-based Compensation Expense	148,996	127,286
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	54,458	49,159
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	$ 240,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 10 months 24 days

Deferred fees

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Interest paid on deferred fees

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Share Based Compensation Arrangement By ShareBased Payment Award Award Expiration Period

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Share Based Compensation Arrangement By Share Based Payment Award Options Exercised Forfited Or Expired Number

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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 (h)(1)(i)

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Face value (death benefits) of the life insurance policies underlying the life settlement contracts accounted for under the fair value method.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Life Settlement Contract

-URI http://asc.fasb.org/extlink&oid=6516907

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-Topic 325

-SubTopic 30

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-Paragraph 8

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Period expense related to postemployment benefits.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

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

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- Definition

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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