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Shareholders' Equity (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	72 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Shareholders' Equity [Abstract]
Acquisition of treasury stock (shares)	116	4,175
Acquisition of treasury stock (value), total	$ 63,405	$ 673,495
Stock repurchase program, authorized amount	800,000	800,000
Value of common shares remaining to be repurchased	$ 126,800	$ 126,800

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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-Name Regulation S-X (SX)

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-Section 02

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

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