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Fair Value Measurements (Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  |  |  |  |  | 0 Months Ended
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Dec. 31, 2013 Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2013 Significant Unobservable Inputs (Level 3) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Fair Value, Measurements, Recurring [Member] | Dec. 31, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member] | Dec. 31, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member] | Dec. 31, 2013 Whitaker [Member] Contingent Consideration Liability [Member] Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |  |  |  |  |  |
Fair Value Inputs, Weighting Given to Base Case Scenario |  |  |  |  |  |  |  |  | 60.00%
Contingent consideration to be paid in cash for the acquisitions | $ 0 | $ 0 | $ 0 | $ 0 | $ (8,527) | $ (7,577) | $ (8,527) | $ (7,577) |

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- Definition This element represents a certain statement of financial position liability caption which represents a class of liabilities, or which may include an individual liability, measured at fair value on a recurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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