Summary Of Significant Accounting Policies (Changes in the Carrying Amount of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill	$ 44,840us-gaap_GoodwillGross	$ 44,840us-gaap_GoodwillGross	$ 44,840us-gaap_GoodwillGross
Accumulated impairment losses	(44,840)	(44,840)	(44,840)
Goodwill	44,840us-gaap_GoodwillGross	44,840us-gaap_GoodwillGross	44,840us-gaap_GoodwillGross
Goodwill, net of accumulated impairment losses	$ 0us-gaap_Goodwill	$ 0us-gaap_Goodwill	$ 0us-gaap_Goodwill

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

+ Details

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Period Type:	instant

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Details

Name:	us-gaap_GoodwillRollForward
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Data Type:	xbrli:stringItemType
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Period Type:	duration