Annual report pursuant to Section 13 and 15(d)

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) - Schedule of Quarterly Results (Details)

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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) - Schedule of Quarterly Results (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]                      
Earnings before income taxes $ 91,776 $ 71,409 $ 71,185 $ 48,884 $ 84,090 $ 63,455 $ 63,205 $ 36,769 $ 283,254 $ 247,519 $ 218,060
Net earnings $ 75,485 $ 54,135 $ 53,838 $ 43,874 $ 35,553 $ 42,550 $ 41,580 $ 23,572 $ 227,332 $ 143,255 $ 149,541
Per Share Data:                      
Basic earnings per share (in dollars per share) $ 1.93 [1] $ 1.34 [1] $ 1.32 [1] $ 1.08 [1] $ 0.88 [1] $ 1.06 [1] $ 1.03 [1] $ 0.59 [1] $ 5.67 $ 3.56 $ 3.74
Diluted earnings per share (in dollars per share) $ 1.91 [1] $ 1.33 [1] $ 1.31 [1] $ 1.07 [1] $ 0.87 [1] $ 1.02 [1] $ 0.98 [1] $ 0.56 [1] $ 5.58 [2] $ 3.41 [2] $ 3.55 [2]
Real Estate [Member]                      
Selected Quarterly Financial Information [Abstract]                      
Revenue $ 1,008,779 $ 884,581 $ 877,495 $ 742,564 $ 946,425 $ 805,597 $ 801,978 $ 672,772 $ 3,513,419 $ 3,226,772 $ 3,029,227
Total closing gross profit $ 188,688 $ 158,517 $ 158,828 $ 123,120 $ 171,225 $ 144,601 $ 140,910 $ 109,763 $ 629,153 $ 566,499 $ 531,212
[1] Due to the computation of earnings per share, the sum of the quarterly amounts may not equal the full-year results.
[2] In accordance with ASC 260-10, Earnings Per Share, ("ASC 260-10") we calculate the dilutive effect of convertible securities using the "if-converted" method based on the number of days the Convertible Notes were outstanding during the period. All of the Convertible Notes were retired in 2017.