The carrying amount of assets an investment adviser manages on behalf of investors.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Period Type:	instant

- Details

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Namespace Prefix:
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- Details

Name:	dei_LegalEntityAxis=zais_ZaisMember
Namespace Prefix:
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- Details

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Organization (Details Textual) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2014
Common Class B [Member]
Common Stock, Par or Stated Value Per Share	$ 0.000001	$ 0.000001
ZAIS [Member]
Assets under Management, Carrying Amount	$ 3,991
Noncontrolling Interest, Ownership Percentage by Parent			100.00%
Equity Method Investment, Ownership Percentage	66.50%
ZGP Founders [Member] \| Common Class B [Member]
Common Stock, Par or Stated Value Per Share	$ 0.000001