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Cash Dividends (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 24, 2015 | Jun. 24, 2015 | Mar. 25, 2015 | Sep. 24, 2014 | Jun. 26, 2014 | Mar. 27, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, per share |  |  |  |  |  |  | $ 0.10 | $ 0.10 | $ 0.30 | $ 0.30
Cash dividends paid |  |  |  |  |  |  |  |  | $ 44,064 |
Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  | $ 44,064 | $ 43,652
Installment 1, FY 2014 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  |  | Mar. 27, 2014
Cash dividends paid, per share |  |  |  |  |  | $ 0.10 |  |  |  |
Installment 1, FY 2014 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  | $ 14,456
Installment 2, FY 2014 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  |  | Jun. 26, 2014
Cash dividends paid, per share |  |  |  |  | $ 0.10 |  |  |  |  |
Installment 2, FY 2014 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  | $ 14,562
Installment 3, FY 2014 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  |  | Sep. 24, 2014
Cash dividends paid, per share |  |  |  | $ 0.10 |  |  |  |  |  |
Installment 3, FY 2014 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  | $ 14,634
Installment 1, FY 2015 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  | Mar. 25, 2015 |
Cash dividends paid, per share |  |  | $ 0.10 |  |  |  |  |  |  |
Installment 1, FY 2015 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  | $ 14,640 |
Installment 2, FY 2015 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  | Jun. 24, 2015 |
Cash dividends paid, per share |  | $ 0.10 |  |  |  |  |  |  |  |
Installment 2, FY 2015 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  | $ 14,712 |
Installment 3, FY 2015 |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid, date |  |  |  |  |  |  |  |  | Sep. 24, 2015 |
Cash dividends paid, per share | $ 0.10 |  |  |  |  |  |  |  |  |
Installment 3, FY 2015 | Retained Earnings |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  | $ 14,712 |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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