Pension Benefits

Post Retirement Benefits

Six months ended June 30,

2012

2011

2012

2011

Service cost

$

127,142

$

137,474

$

13,001

$

11,141

Interest cost

89,149

103,988

14,978

15,886

Expected return on plan assets

(160,932

)

(176,574

)

—

Amortization of unrecognized prior service cost

(26,981

)

(26,982

)

—

Amortization of unrecognized net loss

35,720

21,210

1,457

84

Remaining amortization of unrecognized net loss due to settlements

112,313

—

Net gain due to curtailment

(191,177

)

—

Amortization of transition obligation

—

1,471

1,456

Net periodic benefit cost

$

(14,766

)

$

59,116

$

30,907

$

28,567