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Business Acquisition (Schedule of Non-Recurring Pro Forma Adjustments) (Details) (Acquisition-related Costs [Member], USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Acquisition-related Costs [Member] |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Amortization | $ 3,817,000 us-gaap_AdjustmentForAmortization / us-gaap_NonrecurringAdjustmentAxis = us-gaap_AcquisitionRelatedCostsMember | $ 8,917,000 us-gaap_AdjustmentForAmortization / us-gaap_NonrecurringAdjustmentAxis = us-gaap_AcquisitionRelatedCostsMember

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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration