Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Common Stock, Shares Authorized	300,000,000	300,000,000
Common Stock, Shares, Issued	170,183,515	170,183,515.000
Non-cumulative perpetual preferred stock, series A	115,000
Preferred Stock, Shares Outstanding		100,000
Treasury Stock, Shares	4,425,461	4,793,566.000
Series A Non-Cumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Non-cumulative perpetual preferred stock, series A		115,000
Preferred Stock, Shares Outstanding	100,000