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Stock Repurchase Plan (Details Textual) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Nov. 03, 2003	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Repurchase Plan (Textual)
Authorized common stock for repurchases, amount	$ 15
Remaining authorized share for repurchases, amount		$ 70.0	$ 95.0	$ 80.0

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- Definition

Amount of a stock repurchase plan authorized by an entity's Board of Directors.

+ References

No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.

+ References

No definition available.

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