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Share-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Activity in the company's plan
Outstanding at January 1, 2013, Number of Shares	32,150
Granted, Number of Shares	0
Exercised, Number of Shares	0
Forfeited, Number of Shares	0
Outstanding (vested and expected to vest) at March 31, 2013, Number of Shares	32,150
Exercisable, Number of Shares	32,150
Outstanding at January 1, 2013, Weighted Average Exercise Price per Share	$ 40.93
Granted, Weighted Average Exercise Price per Share	$ 0.00
Exercised, Weighted Average Exercise Price per Share	$ 0.00
Forfeited, Weighted Average Exercise Price per Share	$ 0.00
Outstanding (vested and expected to vest) at March 31, 2013, Weighted Average Exercise Price per Share	$ 40.93
Exercisable, Weighted Average Exercise Price per Share	$ 40.93
Outstanding (vested and expected to vest), Weighted Average Remaining Contractual Term	4 years 1 month 6 days
Outstanding (vested and expected to vest), Aggregate Intrinsic Value	$ 934
Exercisable, Weighted Average Remaining Contractual Term	4 years 1 month 6 days
Exercisable, Aggregate Intrinsic Value	$ 934

X

- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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