XML 65 R55.htm IDEA: XBRL DOCUMENT
v3.19.1

Leases - Schedule Of Right of Use Asset and Lease Liability (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Schedule Of Right Of Use Asset And Liability [Abstract] |  |
Beginning balance | $ 23,091 |
Amortization Of Right-Of-Use Asset | (155) | $ 0
Ending balance | 22,936 |
Schedule Of Lease Liability [Abstract] |  |
Beginning balance | 25,715 |
Amortization Of Lease Liability | (92) | $ 0
Ending balance | $ 25,623 |

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortization Of Lease Liability + References No definition available. + Details
Name: | wfx_AmortizationOfLeaseLiability
Namespace Prefix: | wfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amortization Of Right-Of-Use Asset + References No definition available. + Details
Name: | wfx_AmortizationOfRightOfUseAsset
Namespace Prefix: | wfx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Schedule Of Lease Liability + References No definition available. + Details
Name: | wfx_ScheduleOfLeaseLiabilityAbstract
Namespace Prefix: | wfx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Right Of Use Asset And Liability + References No definition available. + Details
Name: | wfx_ScheduleOfRightOfUseAssetAndLiabilityAbstract
Namespace Prefix: | wfx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration