Annual report pursuant to Section 13 and 15(d)

Dividends (Detail)

v3.20.4
Dividends (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dividend Declared [Line Items]      
Amount per Share of Common Stock $ 0.36 $ 1.36 $ 1.28
Total Dividends [1] $ 42,567 $ 159,951 $ 150,116
First Quarter Dividend      
Dividend Declared [Line Items]      
Declaration Date Feb. 21, 2020 Feb. 23, 2019 Feb. 23, 2018
Record Date Mar. 06, 2020 Mar. 08, 2019 Mar. 08, 2018
Payable Date Mar. 20, 2020 Mar. 22, 2019 Mar. 22, 2018
Amount per Share of Common Stock $ 0.36 $ 0.34 $ 0.32
Total Dividends [1] $ 42,567 $ 39,905 $ 37,471
Second Quarter Dividend      
Dividend Declared [Line Items]      
Declaration Date   May 24, 2019 May 25, 2018
Record Date   Jun. 10, 2019 Jun. 08, 2018
Payable Date   Jun. 24, 2019 Jun. 22, 2018
Amount per Share of Common Stock   $ 0.34 $ 0.32
Total Dividends [1]   $ 40,012 $ 37,523
Third Quarter Dividend      
Dividend Declared [Line Items]      
Declaration Date   Aug. 16, 2019 Aug. 23, 2018
Record Date   Sep. 04, 2019 Sep. 04, 2018
Payable Date   Sep. 18, 2019 Sep. 18, 2018
Amount per Share of Common Stock   $ 0.34 $ 0.32
Total Dividends [1]   $ 40,020 $ 37,530
Fourth Quarter Dividend      
Dividend Declared [Line Items]      
Declaration Date   Nov. 22, 2019 Nov. 15, 2018
Record Date   Dec. 04, 2019 Dec. 04, 2018
Payable Date   Dec. 18, 2019 Dec. 18, 2018
Amount per Share of Common Stock   $ 0.34 $ 0.32
Total Dividends [1]   $ 40,014 $ 37,592
[1] Of the dividends recorded during 2018, 2019 and 2020, $624, $670 and $256, respectively, were related to outstanding restricted stock units and will not be paid until such units vest. See Note 17.