Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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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

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- 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.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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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.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 470
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Debt Obligations - Schedule of Notes Payable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	Feb. 28, 2019	Dec. 31, 2018
Long Term Debt [Line Items]
Long-term debt outstanding	$ 1,270,469,000				$ 1,358,430,000
Less: unamortized debt issuance costs	(19,463,000)				(21,081,000)
Total debt obligations	1,251,006,000				1,337,349,000
Credit facility at a floating rate of interest of one-month LIBOR plus 1.375% at December 31, 2019, secured by engines. The facility has a committed amount of $1.0 billion at December 31, 2019, which revolves until the maturity date of June 2024
Long Term Debt [Line Items]
Line of credit facility outstanding amount	397,000,000				427,000,000
WEST IV Series A 2018 term notes payable at a fixed rate of interest of 4.75%, maturing in September 2043, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 307,014,000				323,075,000
Fixed rate (as a percent)	4.75%
WEST IV Series B 2018 term notes payable at a fixed rate of interest of 5.44%, maturing in September 2043, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 43,859,000				46,154,000
Fixed rate (as a percent)	5.44%
WEST III Series A 2017 term notes payable at a fixed rate of interest of 4.69%, maturing in August 2042, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 257,754,000				274,205,000
Fixed rate (as a percent)	4.69%
WEST III Series B 2017 term notes payable at a fixed rate of interest of 6.36%, maturing in August 2042, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 36,860,000				39,212,000
Fixed rate (as a percent)	6.36%
WEST II Series A 2012 term notes payable at a fixed rate of interest of 5.50%, maturing in September 2037, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 211,572,000				237,847,000
Fixed rate (as a percent)	5.50%
Note payable at three-month LIBOR plus a margin ranging from 1.85% to 2.50% at December 31, 2019, maturing in July 2022, secured by engines
Long Term Debt [Line Items]
Long-term debt outstanding	$ 7,286,000			$ 8,100,000	0
Note payable at fixed rate of interest of 3.18%, maturing in July 2024, secured by an aircraft
Long Term Debt [Line Items]
Long-term debt outstanding	$ 9,124,000				$ 10,937,000
Fixed rate (as a percent)	3.18%
Note payable at fixed rate of interest of 3.18%, maturing in July 2024, secured by an aircraft \| Maximum
Long Term Debt [Line Items]
Fixed rate (as a percent)		3.18%
Revolving credit facility \| Credit facility at a floating rate of interest of one-month LIBOR plus 1.375% at December 31, 2019, secured by engines. The facility has a committed amount of $1.0 billion at December 31, 2019, which revolves until the maturity date of June 2024
Long Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000,000,000		$ 1,000,000,000.0
LIBOR \| Credit facility at a floating rate of interest of one-month LIBOR plus 1.375% at December 31, 2019, secured by engines. The facility has a committed amount of $1.0 billion at December 31, 2019, which revolves until the maturity date of June 2024
Long Term Debt [Line Items]
Variable rate spread	1.375%
LIBOR \| Note payable at three-month LIBOR plus a margin ranging from 1.85% to 2.50% at December 31, 2019, maturing in July 2022, secured by engines \| Minimum
Long Term Debt [Line Items]
Variable rate spread	1.85%
LIBOR \| Note payable at three-month LIBOR plus a margin ranging from 1.85% to 2.50% at December 31, 2019, maturing in July 2022, secured by engines \| Maximum
Long Term Debt [Line Items]
Variable rate spread	2.50%