Stock-Based Compensation (Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range) (Details) - $ / shares shares in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number outstanding June 30, 2015 (in shares)	87,436	87,436
Weighted average remaining contractual life (in years)
Weighted average exercise price (in dollars per share)	$ 23.60	$ 23.60
Option Exercisable One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number outstanding June 30, 2015 (in shares)	66,225
Weighted average remaining contractual life (in years)	1 year
Weighted average exercise price (in dollars per share)	$ 22.29
Option Exercisable Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number outstanding June 30, 2015 (in shares)	21,211
Weighted average remaining contractual life (in years)	2 years
Weighted average exercise price (in dollars per share)	$ 27.70

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ References

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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