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Summary of Carrying Amount of Goodwill Resulting from Acquisition of 3VR, Thursby, and Viscount (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 9,286
Ending Balance	10,441
3VR, Thursby and Viscount
Goodwill [Line Items]
Beginning Balance	9,286
Acquisition of business	1,173
Currency translation adjustment	(18)
Ending Balance	10,441
3VR, Thursby and Viscount | Premises
Goodwill [Line Items]
Beginning Balance	5,796
Acquisition of business	1,173
Currency translation adjustment	(18)
Ending Balance	6,951
3VR, Thursby and Viscount | Identity
Goodwill [Line Items]
Beginning Balance	3,490
Ending Balance	$ 3,490

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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