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Stockholders' Equity - Additional Information (Detail) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Nov. 05, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Jun. 02, 2016
Stockholders Equity [Line Items] |  |  |  |  |
Value of shares that have been repurchased and retired during the period |  | $ 21,489,000 | $ 26,532,000 |  |
Payment for share repurchase |  | $ 21,489,000 | $ 26,532,000 | $ 4,367,000 |
2016 Stock Repurchase Program |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Board of Directors authorized stock repurchase program |  |  |  |  | $ 100,000,000
Number of shares that have been repurchased and retired during the period |  | 452,300 |  |  |
Average price per share |  | $ 41.06 |  |  |
Value of shares that have been repurchased and retired during the period |  | $ 18,600,000 |  |  |
Available amount under repurchase program |  | 81,400,000 |  |  |
Payment for share repurchase |  | $ 18,600,000 |  |  |
2015 Stock Repurchase Program |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Board of Directors authorized stock repurchase program | $ 50,000,000 |  |  |  |
Number of shares that have been repurchased and retired during the period |  | 85,100 | 764,545 |  |
Average price per share |  | $ 34.16 | $ 34.68 |  |
Value of shares that have been repurchased and retired during the period |  | $ 2,900,000 | $ 26,532,000 |  |
Payment for share repurchase |  | $ 2,900,000 | $ 26,532,000 |  |
Stock repurchase program, period | 6 months |  |  |  |
Stock repurchase program expiration date |  | May 05, 2016 |  |  |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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