XML 84 R73.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value Measurements (Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities $ 2,981,673 $ 2,910,869
Derivative assets 5,760 2,148
Derivative liabilities 1,118 3,938
Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 2,981,673 2,910,869
Derivative assets [1] 11,428 14,157
Total recurring fair value measurements - assets 2,993,101 2,925,026
Derivative liabilities [1] 25,953 14,389
Total recurring fair value measurements - liabilities 25,953 14,389
Recurring [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 2,981,673 2,910,869
Derivative assets [1] 11,428 14,157
Total recurring fair value measurements - assets 2,993,101 2,925,026
Derivative liabilities [1] 25,953 14,389
Total recurring fair value measurements - liabilities 25,953 14,389
Recurring [Member] | U.S. Treasury and Government Agency Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 90,985 97,272
Recurring [Member] | U.S. Treasury and Government Agency Securities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 90,985 97,272
Recurring [Member] | Municipal Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 236,010 243,786
Recurring [Member] | Municipal Obligations [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 236,010 243,786
Recurring [Member] | Corporate Debt Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 3,500 3,500
Recurring [Member] | Corporate Debt Securities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 3,500 3,500
Recurring [Member] | Residential Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 1,774,871 1,715,213
Recurring [Member] | Residential Mortgage-Backed Securities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 1,774,871 1,715,213
Recurring [Member] | Commercial Mortgage-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 729,532 687,135
Recurring [Member] | Commercial Mortgage-Backed Securities [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 729,532 687,135
Recurring [Member] | Collateralized Mortgage Obligations [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities 146,775 163,963
Recurring [Member] | Collateralized Mortgage Obligations [Member] | Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt securities $ 146,775 $ 163,963
[1] For further disaggregation of derivative assets and liabilities, see Note 6 - Derivatives.