XML 49 R38.htm IDEA: XBRL DOCUMENT v3.7.0.1
Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]    
Due in one year or less, Amortized Cost, Held-to-maturity $ 425  
Due after one year through five years, Amortized Cost, Held-to-maturity 124,293  
Due after five years through ten years, Amortized Cost, Held-to-maturity 417,336  
Due after ten years, Amortized Cost, Held-to-maturity 327,715  
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis 869,769  
Due in one year or less, Fair Value, Held-to-maturity 424  
Due after one year through five years, Fair Value, Held-to-maturity 122,167  
Due after five years through ten years, Fair Value, Held-to-maturity 413,416  
Due after ten years, Fair Value, Held-to-maturity 326,478  
Total, Held-to-maturity, Fair Value 862,485  
Due in one year or less, Amortized Cost, Available-for-sale 17,369  
Due after one year through five years, Amortized Cost, Available-for-sale 1,955,896  
Due after five years through ten years, Amortized Cost, Available-for-sale 232,464  
Due after ten years, Amortized Cost, Available-for-sale 45,546  
Amortized Cost, Available-for-sale 2,251,275 $ 2,255,874
Due in one year or less, Fair Value, Available-for-sale 17,485  
Due after one year through five years, Fair Value, Available-for-sale 1,975,849  
Due after five years through ten years, Fair Value, Available-for-sale 230,357  
Due after ten years, Fair Value, Available-for-sale 45,819  
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value $ 2,269,510 $ 2,270,466