Note 11 - Goodwill (Details) - Components of Goodwill (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 533,137us-gaap_GoodwillGross
Accumulated impairment loss	(29,583)
Balance,	427,178us-gaap_Goodwill	402,645us-gaap_Goodwill
Goodwill acquired during the period	107,711us-gaap_GoodwillAcquiredDuringPeriod	68,810us-gaap_GoodwillAcquiredDuringPeriod
Goodwill disposed	(1,795)	(37,195)
Other items	(1,181)us-gaap_GoodwillOtherChanges	(217)us-gaap_GoodwillOtherChanges
Foreign exchange	(28,359)us-gaap_GoodwillTranslationAdjustments	(6,865)us-gaap_GoodwillTranslationAdjustments
Balance,	503,554us-gaap_Goodwill	427,178us-gaap_Goodwill
Commercial Real Estate Services [Member]
Goodwill [Line Items]
Goodwill	316,075
Accumulated impairment loss	(29,583)
Balance,	215,709	155,308
Goodwill acquired during the period	99,567	65,517
Goodwill disposed	(1,104)
Other items	(1,120)
Foreign exchange	(26,560)	(5,116)
Balance,	286,492	215,709
Residential Property Management [Member]
Goodwill [Line Items]
Goodwill	165,019
Balance,	162,878	161,251
Goodwill acquired during the period	4,288	3,293
Goodwill disposed	(691)
Other items	(61)	(217)
Foreign exchange	(1,395)	(1,449)
Balance,	165,019	162,878
Property Services [Member]
Goodwill [Line Items]
Goodwill	52,043
Balance,	48,591	86,086
Goodwill acquired during the period	3,856
Goodwill disposed		(37,195)
Foreign exchange	(404)	(300)
Balance,	$ 52,043	$ 48,591

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 50

-Paragraph 1

-Subparagraph (a,h)

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Amount of other (increase) decrease of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

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-Topic 350

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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-Paragraph 1

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-Section 50

-Paragraph 1

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