Goodwill And Intangible Assets	3 Months Ended
Goodwill And Intangible Assets	Mar. 31, 2012
Goodwill And Intangible Assets [Abstract]
Goodwill And Intangible Assets	4. Goodwill and Intangible Assets Accounting guidance on goodwill and intangible assets requires that goodwill be tested for impairment at the reporting unit level on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Company performs an annual impairment test on goodwill and intangible assets with indefinite lives at October 1st of each year. Based on this latest test, the Company concluded that the fair value of each of the reporting units was in excess of the carrying value as of October 1, 2011. At October 1, 2011 the Company adopted Accounting Standards update ("ASU") 2011-8 which allows for the option to make a qualitative evaluation about the likelihood of goodwill impairment to determine whether the Company should calculate the fair value of a reporting unit. The Company does not believe any triggering event occurred during the three-month period ended March 31, 2012 that would require an interim impairment assessment. As a result, goodwill and intangible assets with indefinite lives were not tested for impairment during the three-month period ended March 31, 2012. As of March 31, 2012 and December 31, 2011, the Company's Condensed Consolidated Balance Sheets reflected $328.1 million of goodwill at each period-end, and $55.0 million and $56.3 million in net intangible assets, respectively. Net intangible assets consist primarily of customer lists, trademarks, and non-compete agreements purchased as part of past acquisitions. The Company has no intention to renew or extend the terms of acquired intangible assets and accordingly, did not incur any related costs during the first quarter of 2012. Amortization of intangible assets purchased totaled $1.3 million for the first quarter of 2012 and for the first quarter of 2011. Accumulated amortization of intangible assets as of March 31, 2012 and December 31, 2011 totaled $28.0 million and $26.7 million, respectively.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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