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Stockholders' Equity (Shares repurchased under the stock repurchase program) (Details) (USD $) In Thousands, except Share data, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 January 2014 [Member]	Sep. 30, 2014 February 2014 [Member]	Sep. 30, 2014 Third Quarter [Member]	Sep. 30, 2014 August 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)			57,700	649,700	707,500	100
Treasury Stock Acquired, Average Cost Per Share			$ 14.73	$ 14.66	$ 14.66	$ 15.50
Treasury Stock, Value	$ 90,652	$ 80,642	$ 850	$ 9,522	$ 10,374	$ 2

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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