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.

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- Definition

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

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions	May 06, 2019	Apr. 19, 2019	Apr. 08, 2019
Secured Loan Arrangements [Member] \| 3.77% [Member]
Subsequent Event [Line Items]
Debt instrument gross amount			$ 15.0
Stated interest rate			3.77%
Debt maturity year			Apr. 08, 2023
Secured Loan Arrangements [Member] \| 3.89% [Member]
Subsequent Event [Line Items]
Debt instrument gross amount		$ 10.0
Stated interest rate		3.89%
Debt maturity year		Apr. 19, 2023
Class A Common Stock [Member]
Subsequent Event [Line Items]
Dividend declared per share	$ 0.14
Dividend payable declared date	May 06, 2019
Dividend payable, date to be paid	Jun. 10, 2019
Dividend payable record date	May 24, 2019
Class B Common Stock [Member]
Subsequent Event [Line Items]
Dividend declared per share	$ 0.14
Dividend payable declared date	May 06, 2019
Dividend payable, date to be paid	Jun. 10, 2019
Dividend payable record date	May 24, 2019