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Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of tax effect allocated to each component of other comprehensive income
The tax effect allocated to each component of other comprehensive income (loss) were as follows:
 
December 31, 2017
Before-Tax
Amount
 
Tax (Expense)
Benefit
 
Net of Tax
Available-for-sale securities:
 
 
 
 
 
(in thousands)
 
 
 
 
 
Change in net unrealized gain during the period
$
(4,442
)
 
$
1,761

 
$
(2,681
)
Reclassification adjustment for net realized loss on sale included in available-for-sale securities
407

 
(163
)
 
244

Net unrealized losses
(4,035
)
 
1,598

 
(2,437
)
 
 
 
 
 
 
Employee benefit plans:
 
 
 
 
 
Net retirement plan loss
(4,549
)
 
1,115

 
(3,434
)
Net retirement plan prior service credit
964

 
(236
)
 
728

Amortization of net retirement plan actuarial loss
1,508

 
(603
)
 
905

Amortization of net retirement plan prior service (cost) credit
15

 
(6
)
 
9

Employee benefit plans
(2,062
)
 
270

 
(1,792
)
 
 
 
 
 
 
Other comprehensive loss
$
(6,097
)
 
$
1,868

 
$
(4,229
)
  
December 31, 2016
Before-Tax
Amount
 
Tax (Expense)
Benefit
 
Net of Tax
Available-for-sale securities:
 
 
 
 
 
(in thousands)
 
 
 
 
 
Change in net unrealized gain during the period
$
(7,689
)
 
$
3,074

 
$
(4,615
)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities
(926
)
 
370

 
(556
)
Net unrealized losses
(8,615
)
 
3,444

 
(5,171
)
 
 
 
 
 
 
Employee benefit plans:
 
 
 
 
 
Net retirement plan loss
(2,787
)
 
1,114

 
(1,673
)
Net retirement plan prior service credit
(188
)
 
75

 
(113
)
Amortization of net retirement plan actuarial loss
1,338

 
(535
)
 
803

Amortization of net retirement plan prior service (cost) credit
76

 
(30
)
 
46

Employee benefit plans
(1,561
)
 
624

 
(937
)
 
 
 
 
 
 
Other comprehensive loss
$
(10,176
)
 
$
4,068

 
$
(6,108
)

 
December 31, 2015
Before-Tax
Amount
 
Tax (Expense)
Benefit
 
Net of Tax
Available-for-sale securities:
 
 
 
 
 
(in thousands)
 
 
 
 
 
Change in net unrealized gain during the period
$
(8,241
)
 
$
3,295

 
$
(4,946
)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities
(1,108
)
 
443

 
(665
)
Net unrealized losses
(9,349
)
 
3,738

 
(5,611
)
 
 
 
 
 
 
Employee benefit plans:
 
 
 
 
 
Net retirement plan gain
1,846

 
(738
)
 
1,108

Amortization of net retirement plan actuarial loss
2,218

 
(887
)
 
1,331

Amortization of net retirement plan prior service (cost) credit
(6,362
)
 
2,544

 
(3,818
)
Employee benefit plans
(2,298
)
 
919

 
(1,379
)
 
 
 
 
 
 
Other comprehensive loss
$
(11,647
)
 
$
4,657

 
$
(6,990
)
Schedule of accumulated other comprehensive income
The following table presents the activity in our accumulated other comprehensive loss for the periods indicated:
 
(in thousands)
Available-for-Sale
Securities
 
Employee Benefit
Plans
 
Accumulated Other
Comprehensive
Income (loss)
Balance at January 1, 2015
$
2,867

 
$
(26,878
)
 
$
(24,011
)
Other comprehensive loss
(5,611
)
 
(1,379
)
 
(6,990
)
Balance at December 31, 2015
$
(2,744
)
 
$
(28,257
)
 
$
(31,001
)
 
 
 
 
 
 
Balance at January 1, 2016
(2,744
)
 
(28,257
)
 
(31,001
)
Other comprehensive loss
(5,171
)
 
(937
)
 
(6,108
)
Balance at December 31, 2016
$
(7,915
)
 
$
(29,194
)
 
$
(37,109
)
 
 
 
 
 
 
Balance at January 1, 2017
(7,915
)
 
(29,194
)
 
(37,109
)
Other comprehensive loss
(2,437
)
 
(1,792
)
 
(4,229
)
Reclassification due to adoption of ASU 2018-02
(2,653
)
 
(7,305
)
 
(9,958
)
Balance at December 31, 2017
$
(13,005
)
 
$
(38,291
)
 
$
(51,296
)

December 31, 2017
 
 
 
Details about Accumulated other Comprehensive Income
(Loss) Components (in thousands)
Amount
Reclassified from
Accumulated
Other
Comprehensive
Income1 
 
Affected Line Item in the Statement Where Net Income is Presented
Available-for-sale securities:
 
 
 
Unrealized gains and losses on available-for-sale securities
$
(407
)
 
Net (loss) gain on securities transactions
 
163

 
Tax expense
 
(244
)
 
Net of tax
Employee benefit plans:
 
 
 
Amortization of the following 2 
 
 
 
Net retirement plan actuarial loss
(1,508
)
 
Pension and other employee benefits
Net retirement plan prior service credit
(15
)
 
Pension and other employee benefits
 
(1,523
)
 
Total before tax
 
609

 
Tax benefit
 
(914
)
 
Net of tax
 
December 31, 2016
 
 
 
Details about Accumulated other Comprehensive Income
(Loss) Components (in thousands)
Amount  
Reclassified from
Accumulated
Other
Comprehensive
Income1 
 
Affected Line Item in the Statement Where Net Income is Presented
Available-for-sale securities:
 
 
 
Unrealized gains and losses on available-for-sale securities
$
926

 
Net (loss) gain on securities transactions
 
(370
)
 
Tax expense
 
556

 
Net of tax
Employee benefit plans:
 
 
 
Amortization of the following 2 
 
 
 
Net retirement plan actuarial loss
(1,338
)
 
Pension and other employee benefits
Net retirement plan prior service credit
(76
)
 
Pension and other employee benefits
 
(1,414
)
 
Total before tax
 
565

 
Tax benefit
 
(849
)
 
Net of tax
1 Amounts in parentheses indicate debits in income statement.
2 The accumulated other comprehensive income components are included in the computation of net periodic benefit cost (See Note 11 - “Employee Benefit Plans”).