1. Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Options
Number of Options Outstanding, Beginning	79,017	150,071	169,462
Number of Options Granted	0	0	0
Number of Options Expired/Forfeited	(6,052)	(71,054)	(19,391)
Number of Options Exercised	(69,335)	0	0
Number of Options Outstanding, Ending	3,630	79,017	150,071
Exercisable, December 31, 2012	3,630
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning	$ 7.97	$ 8.32	$ 8.17
Weighted Average Exercise Price Granted	$ 0	$ 0	$ 0
Weighted Average Exercise Price Expired/Forfeited	$ 8.89	$ 8.71	$ 6.99
Weighted Average Exercise Price Exercised	$ 7.77	$ 0	$ 0
Weighted Average Exercise Price Outstanding, Ending	$ 10.31	$ 7.97	$ 8.32
Weighted Average Exercise Price Exercisable, December 31, 2012	$ 10.31
Weighted Average Remaining Contractual Life (in years)
Weighted Average Remaining Contractual Term (in years) Outstanding	1 year 4 months 6 days
Weighted Average Remaining Contractual Term (in years) Exercisable, December 31, 2012	1 year 4 months 6 days

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

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