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Accumulated Other Comprehensive Income
 3 Months Ended
Mar. 31, 2016
Equity [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income
The following table presents changes in other comprehensive income: 
 
Before-Tax Amount
 
Tax Effect
 
Net of Tax Amount
 
(in thousands)
Three months ended March 31, 2016
 
 
 
 
 
Unrealized gain on securities
$
26,193

 
$
(9,167
)
 
$
17,026

Reclassification adjustment for securities gains included in net income (1)
(947
)
 
331

 
(616
)
Amortization of unrealized loss on derivative financial instruments (2)
6

 
(2
)
 
4

Amortization of net unrecognized pension and postretirement items (3)
717

 
(251
)
 
466

Total Other Comprehensive Income
$
25,969

 
$
(9,089
)
 
$
16,880

Three months ended March 31, 2015
 
 
 
 
 
Unrealized gain on securities
$
15,371

 
$
(5,379
)
 
$
9,992

Reclassification adjustment for securities gains included in net income (1)
(4,145
)
 
1,450

 
(2,695
)
Non-credit related unrealized gains on other-than-temporarily impaired debt securities
192

 
(67
)
 
125

Amortization of unrealized loss on derivative financial instruments(2)
52

 
(18
)
 
34

Amortization of net unrecognized pension and postretirement items (3)
717

 
(251
)
 
466

Total Other Comprehensive Income
$
12,187

 
$
(4,265
)
 
$
7,922

 
 
 
 
 
 


(1)
Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details.
(2)
Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Interest expense" on the consolidated statements of income.
(3)
Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details.
The following table presents changes in each component of accumulated other comprehensive income, net of tax: 
 
Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired
 
Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities
 
Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps
 
Unrecognized Pension and Postretirement Plan Income (Costs)
 
Total
 
(in thousands)
Three months ended March 31, 2016
 
 
 
 
 
 
 
 
 
Balance at December 31, 2015
$
(6,499
)
 
$
458

 
$
(15
)
 
$
(15,961
)
 
$
(22,017
)
Other comprehensive income before reclassifications
17,026

 
—

 
—

 
—

 
17,026

Amounts reclassified from accumulated other comprehensive income (loss)
(616
)
 
—

 
4

 
466

 
(146
)
Balance at March 31, 2016
$
9,911

 
$
458

 
$
(11
)
 
$
(15,495
)
 
$
(5,137
)
Three months ended March 31, 2015

 

 
 
 

 

Balance at December 31, 2014
$
5,980

 
$
1,349

 
$
(2,546
)
 
$
(22,505
)
 
$
(17,722
)
Other comprehensive income before reclassifications
9,992


125

 
—

 
—

 
10,117

Amounts reclassified from accumulated other comprehensive income (loss)
(1,661
)
 
(1,034
)
 
34

 
466

 
(2,195
)
Balance at March 31, 2015
$
14,311

 
$
440

 
$
(2,512
)
 
$
(22,039
)
 
$
(9,800
)