Earnings Per Share - Components of Calculation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2019	[1]	Sep. 30, 2019	[1]	Jun. 30, 2019	[1]	Mar. 31, 2019	[1]	Dec. 31, 2018	[2]	Sep. 30, 2018	[2]	Jun. 30, 2018	[2]	Mar. 31, 2018	[2]	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 34,843		$ 81,274		$ 30,955		$ 46,742		$ 38,191		$ 84,739		$ 55,343		$ 45,721		$ 193,814	$ 223,994	$ 269,659
Weighted average number of shares used in:
Basic earnings per share																	110,939	110,603	110,353
Dilutive common stock equivalents:
Restricted stock units																	569	1,029	1,010
Diluted earnings per share																	111,508	111,632	111,363

[1] The first, second, third and fourth quarters of 2019 include rationalization charges of $6.1 million, $39.3 million, $3.2 million and $7.8 million, respectively. The third quarter of 2019 includes a loss on early extinguishment of debt of $1.7 million. The fourth quarter of 2019 includes costs attributed to announced acquisitions of $1.8 million.

[2] The first, second, third and fourth quarters of 2018 include rationalization charges of $0.7 million, $0.5 million, $0.3 million and $4.8 million, respectively. The second quarter of 2018 includes a loss on early extinguishment of debt of $2.5 million.