Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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 (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

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

- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (e)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Deferred Stock Units, Gross

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeDeferredStockUnitsGross
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Forfeited

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeRestrictedSharesForfeited
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Shares, Gross

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeRestrictedSharesGross
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Forfeited

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeRestrictedStockUnitsForfeited
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Restricted Stock Units, Gross

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeRestrictedStockUnitsGross
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period Shares Share-based Compensation Cumulative Stock Option Units, Forfeited

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeStockOptionUnitsForfeited
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock Issued During Period, Shares, Share-based Compensation, Cumulative Stock Option Units, Gross

+ References

No definition available.

+ Details

Name:	ver_StockIssuedDuringPeriodSharesSharebasedCompensationCumulativeStockOptionUnitsGross
Namespace Prefix:	ver_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_PlanNameAxis=ver_EquityPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ver_NonExecutiveDirectorRestrictedSharePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=ver_TimeBasedRestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=ver_LongTermIncentiveTargetAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=ver_DeferredStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies - Equity-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 17,300		$ 17,300
Weighted-average remaining term (years)			2 years 1 month 6 days
Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance (shares)	97,600,000		97,600,000
Common Stock [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period (shares)			16,600,000
Cumulative Restricted share awards (shares)	4,000,000.0		4,000,000.0
Cumulative Restricted share awards forfeited (shares)	3,700,000		3,700,000
Cumulative Restricted Stock Units (shares)	6,600,000		6,600,000
Cumulative Restricted Stock Units forfeited (shares)	1,800,000		1,800,000
Cumulative Deferred Stock Units (shares)	600,000		600,000
Cumulative Stock Options (shares)	5,400,000		5,400,000
Cumulative stock options forfeited (shares)	200,000		200,000
Common Stock [Member] \| Non-Executive Director Restricted Share Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period (shares)			45,000
Shares available for future issuance (shares)	99,000		99,000
General and Administrative Expense [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 3,144	$ 3,323	$ 9,899	$ 10,203
General and Administrative Expense [Member] \| Restricted Stock [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	0	149	77	466
General and Administrative Expense [Member] \| Time-Based Restricted Stock Units [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,272	1,338	3,748	3,931
General and Administrative Expense [Member] \| Long Term Incentive Target Awards [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,455	1,564	4,074	4,270
General and Administrative Expense [Member] \| Deferred Stock Units [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	82	72	1,101	1,087
General and Administrative Expense [Member] \| Share-based Payment Arrangement, Option [Member] \| Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 335	$ 200	$ 899	$ 449