Quarterly report pursuant to Section 13 or 15(d)

Per Share Information - Basic and Diluted Earnings Per Share Attributable to Common Stock (Detail)

v3.10.0.1
Per Share Information - Basic and Diluted Earnings Per Share Attributable to Common Stock (Detail) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Amounts attributable to common stock:        
Net income attributable to common stock $ 74,365 $ 63,837 $ 111,979 $ 112,104
Weighted average shares:        
Weighted average shares outstanding for basic earnings per share attributable to common stock (in shares) 153,325 155,090 154,906 154,859
Effect of dilutive unvested non-participating stock-based awards 1,270 1,075 1,206 886
Weighted average shares outstanding for diluted earnings per share attributable to common stock (in shares) 154,595 156,165 156,112 155,745