CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investment securities held to maturity:	$ 1,831,145	$ 1,924,597
Preferred stock, par value (usd per share)
Preferred stock, shares authorized (in shares)	50,000,000
Common stock, par value (usd per share)
Common stock, shares authorized (in shares)	450,000,000
Common stock, shares issued (in shares)	264,197,172	263,804,877
Treasury stock, shares (in shares)	0	166,047
Series A Preferred Stock
Preferred stock, shares issued (in shares)	4,600,000	4,600,000
Series B Preferred Stock
Preferred stock, shares issued (in shares)	4,000,000