Face (par) amount of debt instrument at time of issuance.

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

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

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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

Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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-Publisher FASB
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Amount of the required periodic payments including both interest and principal payments.

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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- Definition

Debt instrument maturity or due date month and year.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Debt instrument prorated periodic payment.

+ References

No definition available.

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Long-Term Debt - Notes Payable to BMI - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Repayment of note payable		$ 600.2	$ 309.0	$ 53.4
BMI \| Bank note payable \| Meadows Bank
Debt Instrument [Line Items]
Repayment of note payable	$ 8.5
BMI \| 2017 Bank Loan \| Bank note payable \| Western Alliance Bank
Debt Instrument [Line Items]
Principal amount of loan agreement	$ 20.5
Frequency of debt instrument payment	semi-annual
Debt instrument, payment terms	The agreement requires semi-annual payments of principal and interest on June 1 and December 1 aggregating $1.9 million annually beginning on June 1, 2017 through the maturity date in June 2032 (except during 2017 which calls for prorated aggregate principal and interest payments of $1.6 million).
Periodic principal and interest payments	$ 1.9
Loans maturity period	2032-06
Prorated principal and interest payments	$ 1.6
Interest rate	5.34%
Debt issuance cost	$ 0.9