Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 207,324	$ 215,147
Total ending allowance balance	$ 48,440	$ 17,667
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	99,000,000	99,000,000
Common stock, shares issued	43,788,692	45,000,840
Common stock, shares outstanding (in shares)	43,763,623	44,975,771