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Derivatives (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative [Line Items]  
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.