Stock Options and Stock-Based Compensation (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved for issuance (in shares)	400,000
Compensation cost	$ 302,000
Compensation cost recognized for options granted	85,000	22,000
Unrecognized compensation costs	207,000	89,000
Granted in 1995 (in shares)	0
Term of options, maximum (in years)	10
Percentage of options vesting two years (in hundredths)	50.00%
Vesting term, option one (in years)	2
Percentage of options vesting five years (in hundredths)	50.00%
Vesting term, option two (in years)	5
Summary of status and changes of Stock Option Plan [Roll Forward]
Outstanding, beginning of period (in shares)	51,000	55,500
Granted in 2012 (in shares)	0
Exercised in 2012 (in shares)	(9,000)
Forfeited in 2012 (in shares)	0
Outstanding, end of period (in shares)	42,000	51,000
Exercisable, end of period (in shares)	42,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding options, weighted average exercise price, beginning of period (in dollars per share)	$ 16.47
Granted options, weighted average exercise price (in dollars per share)	$ 0
Exercised options, weighted average exercise price (in dollars per share)	$ 9.33
Forfeited options, weighted average exercise price (in dollars per share)	$ 0
Outstanding options, weighted average exercise price, end of period (in dollars per share)	$ 18.00	$ 16.47
Exercisable options, weighted average exercise price, end of period (in dollars per share)	$ 18.00
Outstanding options, end of period, weighted average remaining contractual term (in years)	2.0
Exercisable options, end of period, weighted average remaining contractual term (in years)	2.0
Exercised options, aggregate intrinsic value	59,000
Outstanding options, end of period, aggregate intrinsic value	0
Exercisable options, end of period, aggregate intrinsic value	$ 0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	19,727
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	3.4
3 Years [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	3.0
Restricted stock granted (in shares)	2,027
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	2.2
2011 Plan [Member] \| 4 Years [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	4.0
Restricted stock granted (in shares)	1,500
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	2.1
2011 Plan [Member] \| 5 Years [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	5.0
Restricted stock granted (in shares)	5,500
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	3.1
2012 Plan [Member] \| 4 Years [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	4.0
Restricted stock granted (in shares)	2,704
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	3.2
2012 Plan [Member] \| 5 Years [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1	5.0
Restricted stock granted (in shares)	7,996
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Award Vesting Period	4.2
1995 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in 1995 (in shares)	600,000
Summary of status and changes of Stock Option Plan [Roll Forward]
Granted in 2012 (in shares)	600,000

Total aggregate intrinsic value on shares exercised.

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The percentage of options vesting five years to total option plan as of the balance sheet date if other than 100 percent.

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Description of the period of time over which an employee's right to exercise the final tranche of options awarded is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

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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.

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Aggregate number of common shares reserved for future issuance.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The maximum vesting term over 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.

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Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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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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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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

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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 stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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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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- Definition

The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-SubTopic 10

-Topic 718

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

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