Consolidated Statements of Stockholders' Equity (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Common stock, par value (in dollars per share)	$ 0.01
Number of ESOP shares purchased | shares	723,751
Common stock, par value (in dollars per share)	$ 0.01
Number of ESOP shares committed to be released | shares	48,250
Ponce De Leon Foundation
Common stock, par value (in dollars per share)	$ 0.01
Initial Public Offering
Common stock, par value (in dollars per share)	$ 0.01
Issuance of common stock, net of costs | $	$ 4,988
Mutual Holding Company
Common stock, par value (in dollars per share)	$ 0.01