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Note 12 - Capital Stock - Capital Stock Issued and Outstanding (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Capital Shares, Number (in shares) | 39,213,136 | 38,934,161
Capital Shares, Amount | $ 415,805 | $ 406,984
Subordinate Voting Shares [Member] |  |
Capital Shares, Number (in shares) | 37,887,442 | 37,608,467
Capital Shares, Amount | $ 415,432 | $ 406,611
Multiple Voting Shares [Member] |  |
Capital Shares, Number (in shares) | 1,325,694 | 1,325,694
Capital Shares, Amount | $ 373 | $ 373

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- Definition Represents the value of the capital stock issued and outstanding. + References No definition available. + Details
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Namespace Prefix: | cigi_
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Balance Type: | credit
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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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- Details
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Period Type: |