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Stock Repurchase Program (Details) (USD $)	1 Months Ended		3 Months Ended	12 Months Ended
Stock Repurchase Program (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Dec. 31, 2012
Stock Repurchase Program (Textual) [Abstract]
Stock repurchase of its outstanding shares	$ 15,000,000	$ 25,000,000
Number of shares repurchased under the program			0	0
Repurchase program termination date			Apr. 26, 2013
Stock repurchased and retired			2,990
Cost of stock repurchased and retired			$ 86,000

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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