Notes Payable to Former Stockholders - Additional Information (Detail) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Notes Payable to Former Stockholders [Member] | ||
| Debt Instrument [Line Items] | ||
| Principal and interest payments on notes payable to former stockholders | $ 1.5 | $ 1.5 |
| Restricted Stock - Notes Payable [Member] | ||
| Debt Instrument [Line Items] | ||
| Unsecured notes interest rate | 5.00% | |
| Unsecured notes maturity date | Jun. 30, 2020 | |
| SARs - Notes Payable [Member] | ||
| Debt Instrument [Line Items] | ||
| Unsecured notes interest rate | 5.00% | |
| Unsecured notes maturity date | Jun. 30, 2020 | |
| X | ||||||||||
- Definition Date when the notes payable to former stockholders is scheduled to be fully repaid. No definition available.
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Definition Amount of the required periodic payments including both interest and principal payments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|