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Acquisitions (Narrative) (Details) (USD $) |  |  | 0 Months Ended | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 September 2013 Acquisition | Jun. 30, 2014 September 2013 Acquisition | Jun. 30, 2013 September 2013 Acquisition | Jun. 30, 2014 September 2013 Acquisition | Jun. 30, 2013 September 2013 Acquisition | Sep. 30, 2013 September 2013 Acquisition | Jun. 30, 2014 Selling, general and administrative costs September 2013 Acquisition | Jun. 30, 2013 Selling, general and administrative costs September 2013 Acquisition | Jun. 30, 2014 Selling, general and administrative costs September 2013 Acquisition | Jun. 30, 2013 Selling, general and administrative costs September 2013 Acquisition | Jun. 30, 2014 Interest Expense September 2013 Acquisition | Jun. 30, 2014 Interest Expense September 2013 Acquisition
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total acquisition related costs |  |  |  | $ (742,000) | $ 2,000 | $ (534,000) | $ 322,000 |  | $ (742,000) | $ 2,000 | $ (740,000) | $ 119,000 |  |
Aggregate purchase consideration |  |  |  |  |  |  |  | 7,454,000 |  |  |  |  |  |
Fair value of business acquisition obligation |  |  | 2,322,000 |  |  | 1,175,000 |  |  |  |  |  |  |  |
Adjustment to payable, expense recorded |  |  |  |  |  |  |  |  | 742,000 |  | 742,000 |  | (26,000) | (53,000)
Goodwill | $ 341,196,000 | $ 341,174,000 |  | $ 2,466,000 |  | $ 2,466,000 |  | $ 2,466,000 |  |  |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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- Definition The expenses and losses recorded for each transaction with the acquiree that was recognized separately from the acquisition of assets and assumptions of liabilities in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition 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. + References 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=35741047&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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