Earnings Per Share - Computation of Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Weighted average shares:
Weighted average common shares outstanding	50,835	50,590	50,615	50,808
Effect of dilutive securities outstanding	626	334	636	363
Diluted weighted average shares outstanding	51,461	50,924	51,251	51,171
Earnings (loss):
Income from continuing operations	$ 14,945	$ 38,600	$ 84,108	$ 92,700
Income from discontinued operations	0	0	0	8
Net income	$ 14,945	$ 38,600	$ 84,108	$ 92,708
Basic per share amounts:
Income from continuing operations	$ 0.29	$ 0.76	$ 1.66	$ 1.82
Income from discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Net income	$ 0.29	$ 0.76	$ 1.66	$ 1.82
Diluted per share amounts:
Income from continuing operations	$ 0.29	$ 0.76	$ 1.64	$ 1.81
Income from discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Net income	$ 0.29	$ 0.76	$ 1.64	$ 1.81