Stockholders' Equity (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 21, 2016 USD ($) shareholder $ / shares shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 shares
Stockholders' Equity
Treasury stock acquired | $		$ 3,997
ESOP loan | $	$ 1,200	$ 1,176
Voting common stock
Stockholders' Equity
Treasury stock acquired (in shares)	2,513,835
Share repurchase price (in dollars per share) | $ / shares	$ 1.59
Number of stockholders from whom shares are repurchased | shareholder	2
Treasury stock acquired | $	$ 4,000
Private Placement | Non-voting common stock
Stockholders' Equity
Proceeds from issuance of private placement | $	$ 1,200
Common stock issued (in shares)	737,861
Common Stock
Stockholders' Equity
Common stock issued (in shares)		737,861
Common stock, shares outstanding		27,421,217	29,076,708
Common Stock | Voting common stock
Stockholders' Equity
Common stock, shares outstanding		18,664,821	21,405,188
Common Stock | Non-voting common stock
Stockholders' Equity
Common stock, shares outstanding		8,756,396	7,671,520
Broadway Federal Bank
Stockholders' Equity
Dividends from bank subsidiary | $	$ 4,000