XML 70 R58.htm IDEA: XBRL DOCUMENT v3.7.0.1
Shareholders' Equity - Issued and Outstanding Preferred Stock (Parenthetical) (Detail) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Series A Fixed Rate Cumulative Perpetual Preferred Stock [Member]    
Class of Stock [Line Items]    
Preferred stock, liquidation preference per share $ 1,000 $ 1,000
Preferred stock dividend rate 6.375% 6.375%
Exercise price of each class of warrants or rights outstanding $ 73.84 $ 73.84
Warrants and rights outstanding 544,279  
Warrants, year of expiration 2018 2018
Series C Fixed Rate Cumulative Perpetual Preferred Stock [Member]    
Class of Stock [Line Items]    
Preferred stock, liquidation preference per share $ 1,000 $ 1,000
Preferred stock dividend rate 6.375% 6.375%
Series E Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]    
Class of Stock [Line Items]    
Preferred stock, liquidation preference per share $ 1,000 $ 1,000
Preferred stock dividend rate 6.45% 6.45%
Date of change in the dividend rate Feb. 14, 2024 Feb. 14, 2024
London Interbank offered rate plus basis points 3.61% 3.61%
Preferred shares redemption date Feb. 15, 2024 Feb. 15, 2024
Preferred Stock, Redemption Feature, Redemption Term 90 days 90 days
Series F Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock [Member]    
Class of Stock [Line Items]    
Preferred stock, liquidation preference per share $ 10,000 $ 10,000
Preferred stock dividend rate 5.125% 5.125%
Date of change in the dividend rate Oct. 31, 2026 Oct. 31, 2026
London Interbank offered rate plus basis points 3.52% 3.52%
Preferred shares redemption date Nov. 01, 2026 Nov. 01, 2026
Preferred Stock, Redemption Feature, Redemption Term 90 days 90 days