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Stock Based Compensation (Schedule of Activity and Changes Under the Principal Option Plan ) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Begininng Balance- shares	183,574	171,378	198,946
Granted Stock Option Plan - Shares	41,639	27,784	27,784
Exercised Stock Option Plan - Shares	2,268	(15,588)	(42,495)
Expired or Cancelled Stock Option Plan - Shares	(34,565)	0	(12,857)
Outstaning Ending Balance- shares	188,380	183,574	171,378
Granted Stock Option Plan - Exercise Price Range per Share		$ 9.64	$ 9.11
Exercised Stock Option Plan - Exercise Price Range per Share			$ 7.71
Expired or Cancelled Stock Option Plan - Exercise Price Range per Share		$ 0.00
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Begininng Balance- shares		15.73
Outstaning Ending Balance- shares			15.73
Outstanding Beginning Balance- Exercise Price Range per Share	$ 15.73		$ 15.73
Granted Stock Option Plan - Exercise Price Range per Share	$ 14.24
Exercised Stock Option Plan - Exercise Price Range per Share	$ 10.66	$ 10.50
Expired or Cancelled Stock Option Plan - Exercise Price Range per Share	$ 15.73		$ 15.73
Outstanding Ending Balance- Exercise Price Range per Share	$ 15.73	$ 15.73
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Begininng Balance- shares		7.67
Outstaning Ending Balance- shares			7.67
Outstanding Beginning Balance- Exercise Price Range per Share	$ 7.67		$ 7.67
Granted Stock Option Plan - Exercise Price Range per Share	$ 12.52
Exercised Stock Option Plan - Exercise Price Range per Share	$ 7.67	$ 7.67
Expired or Cancelled Stock Option Plan - Exercise Price Range per Share	$ 7.67		$ 10.50
Outstanding Ending Balance- Exercise Price Range per Share	$ 7.67	$ 7.67

X

- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all exercised stock options which are in the customized range of exercise prices.

+ References

No definition available.

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all expired or cancelled stock options which are in the customized range of exercise prices.

+ References

No definition available.

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all granted stock options which are in the customized range of exercise prices.

+ References

No definition available.

+ Details

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X

- Definition

For presentations that combine terminations, 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 or that expired.

+ 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)(iv)(3)-(4)

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

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- Definition

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

+ References

No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

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X

- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ 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)(i)-(ii)

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

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X

- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: 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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-Name Accounting Standards Codification

-Topic 505

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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



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-Publisher FASB

-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



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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