Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

No definition available.

Name:	us-gaap_LitigationSettlementExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of claims settled.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyClaimsSettledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of defendants named in a legal action.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfDefendants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Litigation, Holdings of Plaintiff, Percent of Stock Holding of Pending Shareholder Actions

+ References

No definition available.

+ Details

Name:	ver_LitigationHoldingsofPlaintiffPercentofStockHoldingofPendingShareholderActions
Namespace Prefix:	ver_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Litigation Settlement, Stipulation of Settlement, Expense, Maximum

+ References

No definition available.

+ Details

Name:	ver_LitigationSettlementStipulationofSettlementExpenseMaximum
Namespace Prefix:	ver_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_LitigationCaseAxis=ver_SouthernDistrictofNewYorkActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ver_OptOutActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ver_VanguardActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ver_PutativeClassActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=ver_AuditCommitteeInvestigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ver_EightOptOutActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ver_FourOptOutActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Litigation Narrative (Details)			1 Months Ended		9 Months Ended
	Jun. 07, 2018 USD ($)	Sep. 08, 2016 plaintiff	Oct. 26, 2018 USD ($) lawsuit	Dec. 31, 2013 USD ($)	Sep. 30, 2018 USD ($) lawsuit	Jun. 19, 2018	Jan. 20, 2015 lawsuit
Loss Contingencies [Line Items]
Litigation settlement payment					$ 217,500,000
Holdings as a percent of total pending shareholder actions					31.00%
SDNY Actions [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of claims \| lawsuit							10
Opt-Out Actions [Member]
Loss Contingencies [Line Items]
Number of claims \| lawsuit					13
Vanguard Action [Member]
Loss Contingencies [Line Items]
Litigation settlement payment	$ 90,000,000
Holdings as a percent of total pending shareholder actions						13.00%
Putative Class Action [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Stipulation of settlement, maximum attorney fees				$ 625,000
Audit Committee Investigation [Member] \| SDNY Actions [Member]
Loss Contingencies [Line Items]
Number of individuals in civil complaint \| plaintiff		2
Subsequent Event [Member] \| Opt-Out Actions [Member]
Loss Contingencies [Line Items]
Number of settled litigations \| lawsuit			12
Litigation settlement payment			$ 127,500,000
Subsequent Event [Member] \| Eight Opt-Out Actions [Member]
Loss Contingencies [Line Items]
Number of settled litigations \| lawsuit			8
Litigation settlement payment			$ 85,000,000
Holdings as a percent of total pending shareholder actions			11.00%
Subsequent Event [Member] \| Four Opt-Out Actions [Member]
Loss Contingencies [Line Items]
Number of settled litigations \| lawsuit			4
Litigation settlement payment			$ 42,500,000
Holdings as a percent of total pending shareholder actions			7.00%