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Employee Benefit Plans
 9 Months Ended
Sep. 30, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Employee Benefit Plans
14. Employee Benefit Plans

Retirement Plans

The Company offers defined contribution retirement plans which cover the majority of its U.S. employees, as well as employees in certain other countries. In addition, the Company sponsors qualified defined benefit pension plans covering certain employees of the Company and its subsidiaries. The plans’ benefits are generally based on years of service and employee compensation. The Company also provides to certain management employees, through non-qualified plans, supplemental retirement benefits in excess of qualified plan limits imposed by federal tax law.

The following tables set forth the components of the Company’s net periodic expense relating to retirement benefit plans:

Qualified Defined Benefits
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
U.S. Plan
 
Non-U.S. Plans
 
U.S. Plan
 
Non-U.S. Plans
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service Cost
$
3,915

 
$
3,722

 
$
1,655

 
$
1,282

 
$
11,746

 
$
11,164

 
$
5,006

 
$
4,327

Interest Cost
5,790

 
6,314

 
1,482

 
1,710

 
17,372

 
18,943

 
4,444

 
5,716

Expected return on plan assets
(10,392
)
 
(10,398
)
 
(2,012
)
 
(1,771
)
 
(31,178
)
 
(31,195
)
 
(6,042
)
 
(5,882
)
Amortization:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service cost
225

 
271

 
22

 
22

 
673

 
812

 
67

 
76

Recognized actuarial loss
3,155

 
2,073

 
665

 
183

 
9,465

 
6,217

 
2,001

 
626

Transition obligation
—

 
—

 
(15
)
 
1

 
—

 
—

 
3

 
3

Curtailments, special termination benefits, and settlements (1)
—

 
—

 
2

 
2

 
810

 
—

 
5

 
5

Net periodic expense
$
2,693

 
$
1,982

 
$
1,799

 
$
1,429

 
$
8,888

 
$
5,941

 
$
5,484

 
$
4,871


(1)
One-time charges of $810 reflected in pension expense for the nine months ended September 30, 2015 represents curtailments, special termination benefits, and settlements for certain businesses classified as held for sale; therefore, this amount has been reflected in the results of discontinued operations.

The net periodic expense reflected above for non-U.S. plans for the nine months ended September 30, 2014 excludes certain non-U.S. plans sponsored by Knowles that were distributed as part of the separation on February 28, 2014. The historical expense relating to these plans was not significant for the nine months ended September 30, 2014. The expense relating to these plans is reflected in earnings from discontinued operations.

Non-Qualified Supplemental Benefits
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2015
 
2014
 
2015
 
2014
Service Cost
$
934

 
$
830

 
$
2,804

 
$
2,490

Interest Cost
1,266

 
1,537

 
3,797

 
4,611

Amortization:
 
 
 
 
 
 
 
   Prior service cost
1,731

 
1,944

 
5,195

 
5,831

   Recognized actuarial loss (gain)
71

 
(107
)
 
214

 
(320
)
Net periodic expense
$
4,002

 
$
4,204

 
$
12,010

 
$
12,612



Post-Retirement Plans

The Company also maintains post retirement benefit plans, although these plans are effectively closed to new entrants. The supplemental and post retirement benefit plans are supported by the general assets of the Company. The following table sets forth the components of the Company’s net periodic expense relating to its post-retirement benefit plans:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2015
 
2014
 
2015
 
2014
Service Cost
$
41

 
$
63

 
$
122

 
$
187

Interest Cost
128

 
156

 
384

 
470

Amortization:
 
 
 
 
 
 
 
   Prior service cost
(93
)
 
(103
)
 
(279
)
 
(307
)
   Recognized actuarial (gain) loss
(8
)
 
14

 
(23
)
 
40

Net periodic expense
$
68

 
$
130

 
$
204

 
$
390



The total amount amortized out of accumulated other comprehensive income into net periodic benefit expense totaled $5,753 and $4,298 for the three months ended September 30, 2015 and 2014, respectively, and $17,316 and $12,978 for the nine months months ended September 30, 2015 and 2014, respectively. The amortization included in other comprehensive income for the nine months ended September 30, 2014 includes insignificant amounts related to plans sponsored by Knowles that were transfered as part of the separation in 2014.

Defined Contribution Retirement Plans

The Company also offers defined contribution retirement plans which cover the majority of its U.S. employees, as well as employees in certain other countries. The Company’s expense relating to defined contribution plans was $7,601, and $8,295 for the three months ended September 30, 2015 and 2014, respectively, and $24,612 and $25,537 for the nine months ended September 30, 2015 and 2014.