CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance (in shares) at Dec. 31, 2019		67,176,996
Shares issued		1,557,465
Ending Balance (in shares) at Sep. 30, 2020		68,734,461
Beginning Balance at Dec. 31, 2019		$ 1,210,741	$ (10,259)	$ 738,802
Equity compensation expense		3,502
Issuance of common stock, net of issuance costs		53,356
Payment of minimum tax withholdings for share-based payment awards		(2,408)
Other comprehensive income	$ 645		645
Net income	70,753			70,753
Cash dividends on common stock				(82,281)
Ending Balance at Sep. 30, 2020	$ 1,982,851	$ 1,265,191	(9,614)	727,274
Dividends declared per common share	$ 1.2150
Beginning Balance (in shares) at Jun. 30, 2020		67,913,265
Shares issued		821,196
Ending Balance (in shares) at Sep. 30, 2020		68,734,461
Beginning Balance at Jun. 30, 2020		$ 1,234,901	(9,834)	749,971
Equity compensation expense		824
Issuance of common stock, net of issuance costs		29,466
Other comprehensive income	$ 220		220
Net income	4,876			4,876
Cash dividends on common stock				(27,573)
Ending Balance at Sep. 30, 2020	$ 1,982,851	$ 1,265,191	(9,614)	727,274
Dividends declared per common share	$ 0.4050
Beginning Balance (in shares) at Dec. 31, 2020	69,238,901	69,238,901
Shares issued		1,528,311
Ending Balance (in shares) at Sep. 30, 2021	70,767,212	70,767,212
Beginning Balance at Dec. 31, 2020		$ 1,286,068	(14,378)	758,036
Equity compensation expense		3,540
Issuance of common stock, net of issuance costs		61,345
Payment of minimum tax withholdings for share-based payment awards		(993)
Other comprehensive income	$ 927		927
Net income	96,457			96,457
Cash dividends on common stock				(89,366)
Ending Balance at Sep. 30, 2021	$ 2,101,636	$ 1,349,960	(13,451)	765,127
Dividends declared per common share	$ 1.2675
Beginning Balance (in shares) at Jun. 30, 2021		69,666,667
Shares issued		1,100,545
Ending Balance (in shares) at Sep. 30, 2021	70,767,212	70,767,212
Beginning Balance at Jun. 30, 2021		$ 1,303,411	(13,755)	780,310
Equity compensation expense		893
Issuance of common stock, net of issuance costs		45,656
Other comprehensive income	$ 304		304
Net income	14,366			14,366
Cash dividends on common stock				(29,549)
Ending Balance at Sep. 30, 2021	$ 2,101,636	$ 1,349,960	$ (13,451)	$ 765,127
Dividends declared per common share	$ 0.4225