Balance of the trust assets.

No definition available.

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- Definition

Defined benefit plan number of common shares sold to ESOP trust.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan percentage of equity securities pooled pension funds.

+ References

No definition available.

+ Details

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- Definition

Preceding year asset gain or loss considered to calculate expected return on plan assets.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan percentage of preceding year asset gain or loss considered to calculate expected return on plan assets.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan percentage of second preceding year asset gain or loss considered to calculate expected return on plan assets.

+ References

No definition available.

+ Details

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- Definition

Preceding year asset gain or loss considered to calculate expected return on plan assets.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan target plan asset percentage of debt securities below investment grade.

+ References

No definition available.

+ Details

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- Definition

Expected payment related to nonqualified plan.

+ References

No definition available.

+ Details

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- Definition

Percentage of expected long term rate of return on plan assets.

+ References

No definition available.

+ Details

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- Definition

Percentage of long term return in cash.

+ References

No definition available.

+ Details

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- Definition

Percentage of premium estimated return for equities and properties to risk free rate.

+ References

No definition available.

+ Details

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- Definition

Supplemental executive retirement plan liability.

+ References

No definition available.

+ Details

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- Definition

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512013

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(3)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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- Definition

Net increase or decrease in the plan benefit obligation during the reporting period.

+ References

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

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Postretirement Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 19, 2014	Feb. 20, 2013
Defined Benefit Plan Disclosure [Line Items]
Increase in benefit obligation	$ 9,500,000
Assets gains or losses added for prior year	80.00%
Assets gains or losses added for second preceding year	60.00%
Assets gains or losses added for third preceding year	40.00%
Assets gains or losses added for fourth preceding year	20.00%
Expected long-term rate of return on assets	7.75%
Balance of trust assets	1,741,000scl_BalanceOfTrustAssets	1,849,000scl_BalanceOfTrustAssets
Supplemental plan liability balances	1,776,000	1,899,000
Defined contribution plan expense	8,184,000	9,304,000	10,046,000
Commodities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target allocation for equities	2.00%
Expected long-term rate of return on assets	6.70%
U.S Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of fixed income assets in debt securities	20.00%
Common shares sold to the Company's ESOP trust				37,999	43,534
Expected payment related to unqualified plan	185,000
U.K Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of premium estimated return for equities and properties to risk free rate	3.00%
Percentage of long term return in cash	4.00%
Company's expected contribution to qualified plan	950,000
Statutory Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	145,000	1,999,000	711,000
Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target allocation for equities	34.00%
Expected long-term rate of return on assets	8.82%
Debt Securities [Member] \| U.S Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target allocation for equities	35.00%
Real Estate Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target allocation for equities	4.00%
Expected long-term rate of return on assets	7.40%
Employer Securities [Member] \| U.S Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target allocation for equities	25.00%
U.S. and international equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets	4.73%
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation at end of year	169,407,000
Percentage of equities within the pooled pension fund	41.00%
Expected long-term rate of return on assets	7.75%	7.75%	7.75%
United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation at end of year	$ 22,983,000
Percentage of equities within the pooled pension fund	23.00%
Expected long-term rate of return on assets	5.84%	5.25%	5.46%
Europe [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of equities within the pooled pension fund	20.00%
Other Regions [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of equities within the pooled pension fund	16.00%