Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, no par value (in usd per share)
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, no par value (in usd per share)
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	36,874,055	29,927,746
Common stock, shares outstanding	36,874,055	29,927,746