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The amount of identifiable intangible assets recognized as of the acquisition date.

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Face (par) amount of debt instrument at time of issuance.

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Acquisitions (Narrative) (Details) - USD ($)	Jan. 26, 2017	Dec. 31, 2017	Mar. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 620,333,000	$ 615,252,000
C.B. Fleet Company, Inc.
Business Acquisition [Line Items]
Purchase price	$ 823,700,000
Non-amortizable intangible assets	648,700,000
Amortizable intangible assets	$ 98,900,000
Purchased amortizable intangible assets, weighted average useful life	18 years 8 months 12 days
Goodwill	$ 273,058,000
Term Loans \| C.B. Fleet Company, Inc.
Business Acquisition [Line Items]
Debt instrument, face amount	$ 740,000,000