Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities held to maturity, fair value	$ 1,064,133	$ 752,177
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	47,349,778	32,965,692
Common stock, shares outstanding	47,349,778	32,965,692
Common stock, unvested restricted Stock awards	135,273	135,205
Shares held in rabbit trust at cost	82,565	84,126
Debt Securities, Available-for-sale, Amortized Cost	$ 1,583,736	$ 395,453
Common Stock Outstanding
Common stock, shares outstanding	47,349,778	32,965,692
Subordinated Debt [Member]
Unamortized Debt Issuance Expense	$ 209	$ 304
Long-term Debt [Member]
Unamortized Debt Issuance Expense	$ 0	$ 40