Share Repurchase Programs (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2014
Accelerated Share Repurchases [Line Items]
Aggregate cost of repurchased and retired		$ 79,488
December 2011 Anti-Dilutive Share Repurchase Program [Domain]
Accelerated Share Repurchases [Line Items]
Maximum number of share repurchases authorization	2,000,000	2,000,000
December 2013 Anti-Dilutive Share Repurchase Program [Member]
Accelerated Share Repurchases [Line Items]
Maximum number of share repurchases authorization	2,000,000	2,000,000
Aggregate cost of repurchased and retired	39,050	79,488
Common Stock [Member]
Accelerated Share Repurchases [Line Items]
Repurchased and retired shares	464,389	1,027,072
Aggregate cost of repurchased and retired		$ 514

Represents maximum amount of shares authorized for repurchases under the Anti-Dilutive Share Repurchase Program.

No definition available.

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- Details

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- Definition

Number of shares that have been repurchased and retired during the period.

+ 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

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- Definition

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).

+ References

+ Details

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