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Cash Surrender Value of Life Insurance Policies, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Information about cash surrender value of life insurance policies
Cash surrender value of all life insurance policies, net of loans and related accrued interest	$ 46.9	$ 45.8
Borrowings available	0.0	0.0
Borrowed portion
Information about cash surrender value of life insurance policies
Amount of borrowed funds used to pay premiums and accrued interest owed	51.3	47.9	$ 44.5
Paid premiums and accrued interest on loans against policies	$ 64.7	60.4	$ 56.0
Earle M. Jorgensen Company ("EMJ") | Borrowed portion
Information about cash surrender value of life insurance policies
Interest on borrowings against cash surrender value of certain life insurance policies (as a percent)	11.76%
Rate at which the portion of the policy cash surrender value earns interest and dividend income (as a percent)	11.26%
Loans and accrued interest outstanding on EMJ's life insurance policies	$ 577.6	$ 535.2
Earle M. Jorgensen Company ("EMJ") | Unborrowed portion | Minimum
Information about cash surrender value of life insurance policies
Rate at which the portion of the policy cash surrender value earns interest and dividend income (as a percent)	4.00%

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- Definition

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+ References

No definition available.

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Represents the amount of loan borrowing capacity available against life insurance policies.

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Represents the gross amount of loans borrowed by the entity against cash surrender value of certain life insurance policies to pay premiums and accrued interest owed.

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Represents the fixed interest rate on borrowings against the cash surrender value of certain life insurance policies.

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Represents the amount of loans and accrued interest outstanding on life insurance policies.

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Represents the premiums and accrued interest on loans outstanding against life insurance policies.

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 4
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765

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Rate of interest credited to policyholder deposits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.13(b))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439

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