The table below presents changes in the components of AOCI for the period December 31, 2018 to September 30, 2019:

(in thousands)	Translation adjustments	Pension and postretirement liability adjustments	Derivative valuation adjustment	Total Other Comprehensive Income
December 31, 2018	$(115,976)	$(47,109)	$4,697	$(158,388)
Other comprehensive income/(loss) before reclassifications	(23,177)	280	(8,037)	(30,934)
Interest expense related to swaps reclassified to the Consolidated Statements of Income, net of tax	—	—	(832)	(832)
Pension and postretirement liability adjustments reclassified to Consolidated Statements of Income, net of tax	—	29	—	29
Adjustment related to prior period change in opening valuation allowance	—	(1,346)	—	(1,346)
Net current period other comprehensive income	(23,177)	(1,037)	(8,869)	(33,083)
September 30, 2019	$(139,153)	$(48,146)	$(4,172)	$(191,471)

The table below presents changes in the components of AOCI for the period December 31, 2017 to September 30, 2018:

(in thousands)

Translation adjustments

Pension and postretirement liability adjustments

Derivative valuation adjustment

Total Other Comprehensive Income

December 31, 2017

$(87,318)

$(50,536)

$1,953

$(135,901)

Other comprehensive income/(loss) before reclassifications

(23,582)

2,389

7,374

(13,819)

Pension/postretirement curtailment gain, net of tax

—

(525)

—

(525)

Interest expense related to swaps reclassified to the Consolidated Statements of Income, net of tax

—

—

105

105

Pension and postretirement liability adjustments reclassified to Consolidated Statements of Income, net of tax

—

379

—

379

Net current period other comprehensive income

(23,582)

2,243

7,479

(13,860)

September 30, 2018

$(110,900)

$(48,293)

$9,432

$(149,761)

The components of our Accumulated Other Comprehensive Income that are reclassified to the Statement of Income relate to our pension and postretirement plans and interest rate swaps.

The table below presents the expense/(income) amounts reclassified, and the line items of the Consolidated Statements of Income that were affected for the three and nine months ended September 30, 2019 and 2018:

Three months ended

September 30,

Nine months ended

September 30,

(in thousands)

2019

2018

2019

2018

Pretax Derivative valuation reclassified from Accumulated Other Comprehensive Income:

Expense related to interest rate swaps included in Income

before taxes(a)

$(245)

$(96)

$(1,117)

$138

Income tax effect

62

23

285

(33)

Effect on net income due to items reclassified from Accumulated Other Comprehensive Income

$(183)

$(73)

$(832)

$105

Pretax pension and postretirement liabilities reclassified from Accumulated Other Comprehensive Income:

Pension/postretirement curtailment

—

(232)

—

(750)

Amortization of prior service credit

(1,105)

(1,114)

(3,315)

(3,341)

Amortization of net actuarial loss

1,118

1,294

3,357

3,882

Total pretax amount reclassified (b)

13

(52)

42

(209)

Income tax effect

(4)

16

(13)

63

Effect on net income due to items reclassified from Accumulated Other Comprehensive Income

$9

$(36)

$29

$(146)

(a)

Included in Interest expense, net, are payments related to the interest rate swap agreements and amortization of swap buyouts (see Notes 15 and 16).

(b)

These accumulated other comprehensive income components are included in the computation of net periodic cost (see Note 4).