Cash Dividends (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stockholders Equity Note [Line Items]
Cash dividends paid, per share	$ 0.10	$ 0.05	$ 0.20	$ 0.10
Cash dividends paid			$ 29,018	$ 14,673
Period 1
Stockholders Equity Note [Line Items]
Cash dividends paid, date			Mar. 27, 2014	Mar. 29, 2013
Cash dividends paid, per share			$ 0.10	$ 0.05
Cash dividends paid			14,456	7,312
Period 2
Stockholders Equity Note [Line Items]
Cash dividends paid, date			Jun. 26, 2014	Jun. 28, 2013
Cash dividends paid, per share			$ 0.10	$ 0.05
Cash dividends paid			$ 14,562	$ 7,361

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Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: 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

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

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