XML 105 R74.htm IDEA: XBRL DOCUMENT v2.4.1.9

Cash Dividends Declared Per Ordinary Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Dividends [Line Items]
Dividend Per Share	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.0375us-gaap_CommonStockDividendsPerShareDeclared	$ 0.15us-gaap_CommonStockDividendsPerShareDeclared	$ 0.15us-gaap_CommonStockDividendsPerShareDeclared	$ 0us-gaap_CommonStockDividendsPerShareDeclared
Amount	$ 5,084us-gaap_DividendsCommonStockCash	$ 5,081us-gaap_DividendsCommonStockCash	$ 5,060us-gaap_DividendsCommonStockCash	$ 5,056us-gaap_DividendsCommonStockCash	$ 4,935us-gaap_DividendsCommonStockCash	$ 4,932us-gaap_DividendsCommonStockCash	$ 5,042us-gaap_DividendsCommonStockCash	$ 5,056us-gaap_DividendsCommonStockCash	$ 20,281us-gaap_DividendsCommonStockCash	$ 19,965us-gaap_DividendsCommonStockCash

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Namespace Prefix:	simo_
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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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