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		736,269
Ending Balance (in shares) at Jun. 30, 2020		67,913,265
Beginning Balance at Dec. 31, 2019		$ 1,210,741	$ (10,259)	$ 738,802
Equity compensation expense		2,678
Issuance of common stock, net of issuance costs		23,890
Payment of minimum tax withholdings for share-based payment awards		(2,408)
Other comprehensive income	$ 425		425
Net income	65,877			65,877
Cash dividends on common stock				(54,708)
Ending Balance at Jun. 30, 2020	$ 1,975,038	$ 1,234,901	(9,834)	749,971
Dividends declared per common share	$ 0.8100
Beginning Balance (in shares) at Mar. 31, 2020		67,292,233
Shares issued		621,032
Ending Balance (in shares) at Jun. 30, 2020		67,913,265
Beginning Balance at Mar. 31, 2020		$ 1,209,312	(10,054)	759,837
Equity compensation expense		1,874
Issuance of common stock, net of issuance costs		23,715
Other comprehensive income	$ 220		220
Net income	17,453			17,453
Cash dividends on common stock				(27,319)
Ending Balance at Jun. 30, 2020	$ 1,975,038	$ 1,234,901	(9,834)	749,971
Dividends declared per common share	$ 0.4050
Beginning Balance (in shares) at Dec. 31, 2020	69,238,901	69,238,901
Shares issued		427,766
Ending Balance (in shares) at Jun. 30, 2021	69,666,667	69,666,667
Beginning Balance at Dec. 31, 2020		$ 1,286,068	(14,378)	758,036
Equity compensation expense		2,647
Issuance of common stock, net of issuance costs		15,689
Payment of minimum tax withholdings for share-based payment awards		(993)
Other comprehensive income	$ 623		623
Net income	82,091			82,091
Cash dividends on common stock				(59,817)
Ending Balance at Jun. 30, 2021	$ 2,069,966	$ 1,303,411	(13,755)	780,310
Dividends declared per common share	$ 0.8450
Beginning Balance (in shares) at Mar. 31, 2021		69,313,337
Shares issued		353,330
Ending Balance (in shares) at Jun. 30, 2021	69,666,667	69,666,667
Beginning Balance at Mar. 31, 2021		$ 1,285,999	(14,063)	796,654
Equity compensation expense		1,788
Issuance of common stock, net of issuance costs		15,624
Payment of minimum tax withholdings for share-based payment awards		0
Other comprehensive income	$ 308		308
Net income	14,074			14,074
Cash dividends on common stock				(30,418)
Ending Balance at Jun. 30, 2021	$ 2,069,966	$ 1,303,411	$ (13,755)	$ 780,310
Dividends declared per common share	$ 0.4225