Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill Impairment (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended
Goodwill Impairment (Narrative) (Details) - USD ($)	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	$ 0		$ 0	$ 135,800,000
DPLER [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment			$ 135,800,000	$ 0	$ 135,800,000