Subsequent Events - Additional Information (Detail) - Common Class A [Member] - USD ($) |
Jan. 01, 2017 |
Dec. 31, 2016 |
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| Subsequent Event [Line Items] | ||
| Remaining repurchase authorization amount | $ 45,000,000 | |
| Subsequent Event [Member] | ||
| Subsequent Event [Line Items] | ||
| Additional authorized amount to repurchase of shares | $ 100,000,000 | |
| Remaining repurchase authorization amount | $ 145,000,000 |
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- Definition Stock repurchase program additional authorized amount. No definition available.
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- Definition Amount remaining of a stock repurchase plan authorized. No definition available.
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- Definition 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. No definition available.
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