XML 58 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note 13 - Stock-based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Notes Tables |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of options |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual life (years) |  |  | Aggregate intrinsic value |
Shares issuable under options - December 31, 2016 |  |  | 1,602,850 |  |  | $ | 30.31 |  |  |  |  |  |  |  |  |
Granted |  |  | 450,000 |  |  |  | 46.21 |  |  |  |  |  |  |  |  |
Exercised |  |  | (285,700 | ) |  |  | 19.74 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (13,875 | ) |  |  | 40.10 |  |  |  |  |  |  |  |  |
Shares issuable under options - December 31, 2017 |  |  | 1,753,275 |  |  | $ | 36.03 |  |  |  |  |  |  |  |  |
Granted |  |  | 470,000 |  |  |  | 67.32 |  |  |  |  |  |  |  |  |
Exercised |  |  | (278,975 | ) |  |  | 26.60 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (46,875 | ) |  |  | 39.66 |  |  |  |  |  |  |  |  |
Shares issuable under options - December 31, 2018 |  |  | 1,897,425 |  |  | $ | 45.08 |  |  |  | 2.5 |  |  | $ | 24,676 |
Options exercisable - End of year |  |  | 746,125 |  |  | $ | 35.60 |  |  |  | 1.6 |  |  | $ | 14,495 |
Stock Options Exercised [Table Text Block] |
|  | 2018 |  |  | 2017 |
Number of options exercised |  |  | 278,975 |  |  |  | 285,700 |
Aggregate fair value |  | $ | 17,823 |  |  | $ | 14,213 |
Intrinsic value |  |  | 10,403 |  |  |  | 8,572 |
Amount of cash received |  |  | 7,420 |  |  |  | 5,641 |
Tax benefit recognized |  | $ | 73 |  |  | $ | 102 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2018 |  |  | 2017 |
Risk free rate |  |  | 2.2 | % |  |  | 1.5 | %
Expected life in years |  |  | 4.75 |  |  |  | 4.75 |
Expected volatility |  |  | 29.7 | % |  |  | 28.9 | %
Dividend yield |  |  | 0.1 | % |  |  | 0.2 | %
Weighted average fair value per option granted |  | $ | 19.41 |  |  | $ | 12.36 |

X
- Definition Represents the tabular disclosure of the schedule of stock options exercised. + References No definition available. + Details
Name: | cigi_StockOptionsExercisedTableTextBlock
Namespace Prefix: | cigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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