Cash Dividends (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Stockholders Equity Note [Line Items]
Cash dividends paid, per share	$ 0.10	$ 0.10
Cash dividends paid	$ 14,673	$ 15,438
Period 1
Stockholders Equity Note [Line Items]
Cash dividends paid, date	Mar. 29, 2013	Mar. 30, 2012
Cash dividends paid, per share	$ 0.05	$ 0.05
Cash dividends paid	7,312	7,788
Period 2
Stockholders Equity Note [Line Items]
Cash dividends paid, date	Jun. 28, 2013	Jun. 29, 2012
Cash dividends paid, per share	$ 0.05	$ 0.05
Cash dividends paid	$ 7,361	$ 7,650