XML 116 R104.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities held to maturity $ 985,845 $ 1,056,486
Net LHFI 8,595,417 8,493,234
Acquired loans 170,061 257,438
Deposits 11,072,435 10,577,512
Long-term FHLB advances 913 946
Junior subordinated debt securities 61,856 61,856
Level 2 [Member] | Carrying Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and short-term investments 387,119 336,383
Securities held to maturity 985,845 1,056,486
Deposits 11,072,435 10,577,512
Short-term liabilities 664,538 1,440,876
Long-term FHLB advances 913 946
Junior subordinated debt securities 61,856 61,856
Level 2 [Member] | Estimate Fair Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and short-term investments 387,119 336,383
Securities held to maturity 954,638 1,046,247
Deposits 11,069,067 10,577,858
Short-term liabilities 664,538 1,440,876
Long-term FHLB advances 847 946
Junior subordinated debt securities 52,578 45,773
Level 3 [Member] | Carrying Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net LHFI 8,595,417 8,493,234
Acquired loans 170,061 257,438
Level 3 [Member] | Estimate Fair Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net LHFI 8,513,506 8,507,469
Acquired loans $ 170,061 $ 257,438