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Financing and Other Debt - Summary of Outstanding Borrowings (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Principal | $ 3,132,090 | $ 2,972,674
Current portion of gross debt | 170,556 | 256,529
Less: Unamortized debt issuance costs/debt discount | (17,826) | (7,998)
Short-term debt, net | 152,730 | 248,531
Long-term portion of gross debt | 2,961,534 | 2,716,145
Less: Unamortized debt issuance costs/debt discount | (87,421) | (29,632)
Long-term debt, net | 2,874,113 | 2,686,513
Participation debt |  |
Debt Instrument [Line Items] |  |
Principal | 0 | 50,000
Borrowed Federal Funds |  |
Debt Instrument [Line Items] |  |
Principal | 20,000 | 34,998
Revolving line-of-credit facility under 2016 Credit Agreement | 2016 Credit Agreement |  |
Supplemental information under 2016 Credit Agreement: |  |
Remaining borrowing capacity on revolving credit facility |  | 870,000
Secured debt |  |
Debt Instrument [Line Items] |  |
Principal | 85,945 | 104,261
Secured debt | Line of Credit | 2016 Credit Agreement |  |
Debt Instrument [Line Items] |  |
Principal | 2,316,145 | 2,380,755
Secured debt | Line of Credit | Tranche A term loan |  |
Debt Instrument [Line Items] |  |
Principal | 873,777 | 923,707
Secured debt | Line of Credit | Tranche B term loan |  |
Debt Instrument [Line Items] |  |
Principal | 1,442,368 | 1,457,048
Senior Notes | Notes payable |  |
Debt Instrument [Line Items] |  |
Principal | 400,000 | 400,000
Convertible Debt |  |
Debt Instrument [Line Items] |  |
Principal |  | 0
Revolving line-of-credit facility under 2016 Credit Agreement | 2016 Credit Agreement |  |
Supplemental information under 2016 Credit Agreement: |  |
Remaining borrowing capacity on revolving credit facility | 818,372 | 768,686
Letter of Credit | Revolving line-of-credit facility under 2016 Credit Agreement | 2016 Credit Agreement |  |
Supplemental information under 2016 Credit Agreement: |  |
Letters of credit |  | 51,314
WEX Latin America debt |  |
Debt Instrument [Line Items] |  |
Principal | $ 0 | $ 2,660

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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