XML 53 R43.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Stock-Based Compensation - Compensation Expense (Income) Recorded for All Stock Options, Stock Awards and SARs (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |  |  |
Compensation expense (income) | $ 3,607 | $ (201) | $ 8,055 | $ 2,961

X
- Definition Allocated share based compensation expense (income). + References No definition available. + Details
Name: | scl_AllocatedShareBasedCompensationExpenseIncome
Namespace Prefix: | scl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration