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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, per diluted share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Acquisitions (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill - tax deductible	$ 1,932
Net cash consideration	6,500		366,532
Revenue from continuing operations [Abstract]
As reported	1,715,501us-gaap_SalesRevenueNet	1,802,570us-gaap_SalesRevenueNet
Pro forma	1,716,008	1,891,612
Net earnings from continuing operations [Abstract]
As reported	117,190	170,041
Pro forma	123,313	176,221
Basic earnings per share from continuing operations [Abstract]
As reported (in dollars per share)	$ 0.72	$ 1.00
Pro forma (in dollars per share)	$ 0.76	$ 1.04
Diluted earnings per share from continuing operations [Abstract]
As reported (in dollars per share)	$ 0.72	$ 0.99
Pro forma (in dollars per share)	$ 0.76	$ 1.02
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount	2,500
Acquired finite-lived intangible assets, weighted average useful life	7 years
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset, amount	300
Acquired finite-lived intangible assets, weighted average useful life	3 years
Accelerated Companies [Member]
Business Acquisition [Line Items]
Net cash consideration			$ 435,722