Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 42,324	$ 39,764	$ 33,614	$ 34,351	$ 33,729	$ 33,849
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	40,000,000		40,000,000
Common stock, shares issued	11,911,488		11,825,331
Common stock, shares, outstanding	11,911,488		11,825,331
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, shares issued	0		0