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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Costs of Retirement Plans
The following summarizes the Corporation’s expense under its retirement plans for the years ended December 31:
 
2014
 
2013
 
2012
 
(in thousands)
401(k) Retirement Plan
$
8,643

 
$
11,807

 
$
11,983

Pension Plan
1,514

 
2,477

 
1,834

 
$
10,157

 
$
14,284

 
$
13,817
Pension Plans  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost
The net periodic pension cost for the Pension Plan, as determined by consulting actuaries, consisted of the following components for the years ended December 31:
 
2014
 
2013
 
2012
 
(in thousands)
Service cost (1)
$
367

 
$
202

 
$
157

Interest cost
3,413

 
3,087

 
3,223

Expected return on assets
(3,240
)
 
(3,194
)
 
(3,230
)
Net amortization and deferral
974

 
2,382

 
1,684

Net periodic pension cost
$
1,514

 
$
2,477

 
$
1,834

 
(1)
The Pension Plan was curtailed effective January 1, 2008. Pension plan service cost for all years presented was related to administrative costs associated with the plan and not due to the accrual of additional participant benefits.
Schedule of Changes in Projected Benefit Obligations
The following table summarizes the changes in the projected benefit obligation and fair value of plan assets for the plan years ended December 31:
 
2014
 
2013
 
(in thousands)
Projected benefit obligation at beginning of year
$
73,362

 
$
84,032

Service cost
367

 
202

Interest cost
3,413

 
3,087

Benefit payments
(5,164
)
 
(3,009
)
Change due to change in assumptions
22,055

 
(10,773
)
Experience gain
(954
)
 
(177
)
Projected benefit obligation at end of year
$
93,079

 
$
73,362

 
 
 
 
Fair value of plan assets at beginning of year
$
55,448

 
$
54,772

Actual return on assets
1,446

 
3,685

Benefit payments
(5,164
)
 
(3,009
)
Fair value of plan assets at end of year
$
51,730

 
$
55,448
Schedule of Net Funded Status
The following table presents the funded status of the Pension Plan, included in other liabilities on the consolidated balance sheets, as of December 31:
 
2014
 
2013
 
(in thousands)
Projected benefit obligation
$
(93,079
)
 
$
(73,362
)
Fair value of plan assets
51,730

 
55,448

Funded status
$
(41,349
)
 
$
(17,914
)
Schedule Of Changes In Unrecognized Pension And Postretirement Items
The following table summarizes the changes in the unrecognized net loss included as a component of accumulated other comprehensive loss:
 
Unrecognized Net Loss 
 
Gross of tax
 
Net of tax
 
(in thousands)
Balance as of December 31, 2012
$
29,984

 
$
19,490

Recognized as a component of 2013 periodic pension cost
(2,382
)
 
(1,548
)
Unrecognized gains arising in 2013
(11,441
)
 
(7,437
)
Balance as of December 31, 2013
16,161

 
10,505

Recognized as a component of 2014 periodic pension cost
(974
)
 
(633
)
Unrecognized losses arising in 2014
22,895

 
14,882

Balance as of December 31, 2014
$
38,082

 
$
24,754
Schedule Of Rates Used To Calculate Net Periodic Pension Costs And Present Value Of Benefit Obligations
The following rates were used to calculate net periodic pension cost and the present value of benefit obligations as of December 31:
 
2014
 
2013
 
2012
Discount rate-projected benefit obligation
3.75
%
 
4.75
%
 
3.75
%
Expected long-term rate of return on plan assets
6.00
%
 
6.00
%
 
6.00
%
Schedule of Allocation of Plan Assets
The following table presents a summary of the fair values of the Pension Plan’s assets as of December 31:
 
2014
 
2013
 
Estimated
Fair Value
 
% of Total
Assets
 
Estimated
Fair Value
 
% of Total
Assets
 
(dollars in thousands)
Equity mutual funds
$
8,503

 

 
$
5,882

 

Equity common trust funds
6,018

 

 
8,418

 

Equity securities
14,521

 
28.1
%
 
14,300

 
25.8
%
Cash and money market funds
8,957

 

 
10,574

 

Fixed income mutual funds
9,845

 

 
9,579

 

Corporate debt securities
4,971

 

 
7,815

 

U.S. Government agency securities
3,856

 


 
3,938

 


Fixed income securities and cash
27,629

 
53.4
%
 
31,906

 
57.5
%
Other alternative investment funds
9,580

 
18.5
%
 
9,242

 
16.7
%

$
51,730

 
100.0
%
 
$
55,448

 
100.0
%
Schedule of Expected Benefit Payments
Estimated future benefit payments are as follows (in thousands):
Year
 
2015
$
2,889

2016
3,123

2017
3,388

2018
3,758

2019
3,881

2020 – 2024
23,574

 
$
40,613
Other Postretirement Benefit Plans  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost

The components of the expense for postretirement benefits other than pensions are as follows:
 
2014
 
2013
 
2012
 
(in thousands)
Service cost
$
15

 
$
228

 
$
211

Interest cost
206

 
322

 
346

Expected return on plan assets
—

 
(1
)
 
(2
)
Net amortization and deferral
(347
)
 
(363
)
 
(363
)
Net postretirement benefit cost
$
(126
)
 
$
186

 
$
192
Schedule of Net Funded Status


The following table presents the funded status of the Postretirement Plan, included in other liabilities on the consolidated balance sheets as of December 31:
 
2014
 
2013
 
(in thousands)
Accumulated postretirement benefit obligation
$
(5,552
)
 
$
(8,169
)
Fair value of plan assets
8

 
23

Funded status
$
(5,544
)
 
$
(8,146
)
Schedule Of Changes In Unrecognized Pension And Postretirement Items
The following table summarizes the changes in items recognized as a component of accumulated other comprehensive loss:
 
Gross of tax
 
 
 
Unrecognized
Prior Service
Cost
 
Unrecognized
Net Loss (Gain)
 
Total
 
Net of tax
 
(in thousands)
Balance as of December 31, 2012
$
(1,847
)
 
$
297

 
$
(1,550
)
 
$
(1,008
)
Recognized as a component of 2013 postretirement benefit cost
363

 
—

 
363

 
236

Unrecognized gains arising in 2013
—

 
(1,434
)
 
(1,434
)
 
(932
)
Balance as of December 31, 2013
(1,484
)
 
(1,137
)
 
(2,621
)
 
(1,704
)
Recognized as a component of 2014 postretirement benefit cost, before curtailment
32

 
10

 
42

 
26

Unrecognized gains arising in 2014, prior to curtailment
—

 
(313
)
 
(313
)
 
(203
)
Curtailment gain
1,452

 
—

 
1,452

 
944

Recognized as a component of 2014 postretirement benefit cost, after curtailment
235

 
70

 
305

 
199

Unrecognized gains arising in 2014, after curtailment
(3,358
)
 
1,034

 
(2,324
)
 
(1,511
)
Balance as of December 31, 2014
$
(3,123
)
 
$
(336
)
 
$
(3,459
)
 
$
(2,249
)
Schedule Of Rates Used To Calculate Net Periodic Pension Costs And Present Value Of Benefit Obligations
The following rates were used to calculate net periodic postretirement benefit cost and the present value of benefit obligations as of December 31:
 
2014
 
2013
 
2012
Discount rate-projected benefit obligation
3.75
%
 
4.75
%
 
3.75
%
Expected long-term rate of return on plan assets
3.00
%
 
3.00
%
 
3.00
%
Schedule of Expected Benefit Payments
Estimated future benefit payments under the Postretirement Plan are as follows (in thousands):
Year
 
2015
$
404

2016
400

2017
392

2018
389

2019
384

2020 – 2024
1,809

 
$
3,778
Schedule of Changes in Accumulated Postemployment Benefit Obligations

















The following table summarizes the changes in the accumulated postretirement benefit obligation and fair value of plan assets for the years ended December 31:
 
2014
 
2013
 
(in thousands)
Accumulated postretirement benefit obligation at beginning of year
$
8,169

 
$
9,272

Service cost
15

 
228

Interest cost
206

 
322

Benefit payments
(209
)
 
(230
)
Experience gain
(532
)
 
(423
)
Change due to change in assumptions
1,261

 
(1,000
)
Effect of curtailment
(3,358
)
 
—

Accumulated postretirement benefit obligation at end of year
$
5,552

 
$
8,169

 
 
 
 
Fair value of plan assets at beginning of year
$
23

 
$
45

Employer contributions
194

 
208

Benefit payments
(209
)
 
(230
)
Fair value of plan assets at end of year
$
8

 
$
23