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Common Stock - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) $ / shares shares
Schedule Of Common Stock [Line Items] |  |
Common stock, shares authorized | shares | 250,000,000 | 250,000,000
Common stock, par value | $ / shares | $ 0.01 | $ 0.01
Common stock voting rights | One vote for each share held on all matters submitted to a vote of stockholders. There are no cumulative voting rights with respect to the election of directors. |
Senior leverage ratio | 3.0 |
Share repurchase program, description | Under our credit facility, (described in Note 8, Debt and Financing Arrangements) share repurchases are unlimited when total leverage is less than 3.0. When leverage is greater than 3.0, the annual share repurchase is limited to $25.0 million |
Stock repurchase program authorized to be repurchased | shares | 900,000 | 3,800,000
Payment for acquisition of treasury stock | $ | $ 9,100,000 | $ 35,200,000
Maximum [Member] |  |
Schedule Of Common Stock [Line Items] |  |
Annual share repurchase limit | $ | $ 25,000,000 |

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