Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Common Shares
Weighted average common shares outstanding (in shares)	144,411,835	135,666,503	129,735,723
Non-vested shares (in shares)	(1,774,669)	(1,736,358)	(1,736,022)
Weighted average common Shares - Basic (in shares)	142,637,166	133,930,145	127,999,701
Dilutive effect of forward equity (in shares)	0	6,283	0
Dilutive effect of employee stock purchase plan (in shares)	73,062	70,512	84,283
Weighted average common shares - diluted (in shares)	142,710,228	134,006,940	128,083,984
Net income	$ 66,659	$ 72,195	$ 39,185
Dividends paid on nonvested share-based awards	(2,154)	(2,083)	(2,075)
Net income applicable to common stockholders	$ 64,505	$ 70,112	$ 37,110
Basic earnings per common share (in dollars per share)	$ 0.45	$ 0.52	$ 0.29
Diluted earnings per common share (in dollars per share)	$ 0.45	$ 0.52	$ 0.29