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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule Of Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive loss included the following at December 31, 2017 and 2016:
 
December 31, 2017
 
December 31, 2016
(Dollars in thousands)
Accumulated
other
comprehensive
loss
 
Deferred
tax
benefit
 
Accumulated
other
comprehensive
loss,
net of tax
 
Accumulated
other
comprehensive
loss
 
Deferred
tax
benefit
 
Accumulated
other
comprehensive
loss,
net of tax
Unrealized losses on investment securities available for sale
$
(48,834
)
 
$
(17,889
)
 
$
(30,945
)
 
$
(72,707
)
 
$
(26,832
)
 
$
(45,875
)
Funded status of defined benefit plan
(144,999
)
 
(53,650
)
 
(91,349
)
 
(141,774
)
 
(52,457
)
 
(89,317
)
Total
$
(193,833
)
 
$
(71,539
)
 
$
(122,294
)
 
$
(214,481
)
 
$
(79,289
)
 
$
(135,192
)

The following table highlights changes in accumulated other comprehensive (loss) income by component for the years ended December 31, 2017 and 2016:
(Dollars in thousands)
Unrealized (losses) gains on available-for-sale securities(1)
 
(Losses) gains on cash flow hedges(1)
 
Defined benefit pension items(1)
 
Total
Balance at January 1, 2016
$
(15,125
)
 
$
(892
)
 
$
(48,423
)
 
$
(64,440
)
Other comprehensive (loss) income before reclassifications
(13,946
)
 
892

 
(45,347
)
 
(58,401
)
Amounts reclassified from accumulated other comprehensive loss
(16,804
)
 
—

 
4,453

 
(12,351
)
Net current period other comprehensive (loss) income
(30,750
)
 
892

 
(40,894
)
 
(70,752
)
Balance at December 31, 2016
(45,875
)
 
—

 
(89,317
)
 
(135,192
)
Other comprehensive income (loss) before reclassifications
17,635

 
—

 
(8,156
)
 
9,479

Amounts reclassified from accumulated other comprehensive loss
(2,705
)
 
—

 
6,124

 
3,419

Net current period other comprehensive income (loss)
14,930

 
—

 
(2,032
)
 
12,898

Balance at December 31, 2017
$
(30,945
)
 
$
—

 
$
(91,349
)
 
$
(122,294
)
(1) All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income
(Dollars in thousands)
 
Year ended December 31, 2017
Details about accumulated other comprehensive (loss) income
 
Amount reclassified from accumulated other comprehensive (loss) income(1)
 
Affected line item in the statement where net income is presented
Unrealized gains and losses on available for sale securities
 
$
4,293

 
Securities gains
 
 
(1,588
)
 
Income taxes
 
 
$
2,705

 
Net income
 
 
 
 
 
Amortization of defined benefit pension items
 
 
 
 
Prior service costs
 
$
(210
)
 
Employee benefits
Actuarial losses
 
(9,510
)
 
Employee benefits
 
 
(9,720
)
 
Employee benefits
 
 
3,596

 
Income taxes
 
 
$
(6,124
)
 
Net income
Total reclassifications for the period
 
$
(3,419
)
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
Details about accumulated other comprehensive (loss) income
 
Amount reclassified from accumulated other comprehensive (loss) income(1)
 
Affected line item in the statement where net income is presented
Unrealized gains and losses on available for sale securities
 
$
26,673

 
Securities gains
 
 
(9,869
)
 
Income taxes
 
 
$
16,804

 
Net income
 
 
 
 
 
Amortization of defined benefit pension items
 
 
 
 
Prior service costs
 
$
(210
)
 
Employee benefits
Actuarial losses
 
(6,859
)
 
Employee benefits
 
 
(7,069
)
 
Employee benefits
 
 
2,616

 
Income taxes
 
 
$
(4,453
)
 
Net income
Total reclassifications for the period
 
$
12,351

 
 
(1) Amounts in parentheses indicate debits to profit/loss.