Employee Share-Based Compensation Plans (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of non-vested restricted share activity under the Restricted Share Plans
Nonvested, Weighted Average Grant Value, Granted	$ 1.53	$ 1.25	$ 1.14
Restricted Stock Units (RSUs) [Member]
Summary of non-vested restricted share activity under the Restricted Share Plans
Nonvested, Number, Beginning Balance	15,460	55,470
Nonvested Shares, Granted
Nonvested Shares, Vested	(6,460)	(25,010)
Nonvested Shares, Forfeited		(15,000)
Nonvested, Number, Ending Balance	9,000	15,460
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance	$ 4.33	$ 4.83
Nonvested, Weighted Average Grant Value, Granted
Nonvested, Weighted Average Grant Value, Vested	$ 6.23	$ 6.25
Nonvested, Weighted Average Grant Value, Forfeited		$ 2.97
Nonvested, Weighted Average Grant Date Fair Value, Ending Balance	$ 2.97	$ 4.33
Non-vested restricted shares, Expected to vest	9,000
Weighted average grant date fair value, Expected to vest	$ 2.97

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Share based compensation arrangement by share based payment award equity instruments other than options expected to vest number.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options expected to vest weighted average grant date fair value.

+ References

No definition available.

+ Details

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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- Definition

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).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

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-Topic 718

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Paragraph 2

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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