v3.4.0.3

Note 11 - Acquisitions (Details Textual) - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2015	Jul. 31, 2015
Buckler Transport, Inc. [Member]
Payments to Acquire Businesses, Gross		$ 13.7
FTL [Member]
Payments to Acquire Businesses, Gross	$ 5.4

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cgi_BucklerTransportIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cgi_FTLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: