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Accumulated other comprehensive loss
 6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Accumulated other comprehensive loss Accumulated other comprehensive loss

The following table summarizes the components of, and the changes in, Accumulated Other Comprehensive Loss (AOCL), net of tax (in thousands):
 
Retirement Plans
 
Foreign Currency Translation
 
Total
Quarters Ended:
 
 
 
 
 
Balance at Mar. 31, 2020
$
(141,277
)
 
$
102

 
$
(141,175
)
Other comprehensive loss before reclassifications
—

 
(205
)
 
(205
)
Amounts reclassified from AOCL
1,201

 
—

 
1,201

Total other comprehensive income
1,201

 
(205
)
 
996

Balance at June 30, 2020
$
(140,076
)
 
$
(103
)
 
$
(140,179
)
 
 
 
 
 
 
Balance at Mar. 31, 2019
$
(135,824
)
 
$
392

 
$
(135,432
)
Other comprehensive loss before reclassifications
—

 
(353
)
 
(353
)
Amounts reclassified from AOCL
1,591

 
—

 
1,591

Total other comprehensive income
1,591

 
(353
)
 
1,238

Balance at June 30, 2019
$
(134,233
)
 
$
39

 
$
(134,194
)
 
 
 
 
 
 
 
Retirement Plans
 
Foreign Currency Translation
 
Total
Six Months Ended:
 
 
 
 
 
Balance at Dec. 31, 2019
$
(142,398
)
 
$
(199
)
 
$
(142,597
)
Other comprehensive income before reclassifications
—

 
96

 
96

Amounts reclassified from AOCL
2,322

 
—

 
2,322

Total other comprehensive income
2,322

 
96

 
2,418

Balance at June 30, 2020
$
(140,076
)
 
$
(103
)
 
$
(140,179
)
 
 
 
 
 
 
Balance at Dec. 31, 2018
$
(136,893
)
 
$
382

 
$
(136,511
)
Other comprehensive income before reclassifications
—

 
(343
)
 
(343
)
Amounts reclassified from AOCL
2,660

 
—

 
2,660

Total other comprehensive income
2,660

 
(343
)
 
2,317

Balance at June 30, 2019
$
(134,233
)
 
$
39

 
$
(134,194
)

Reclassifications from AOCL to the Consolidated Statements of Income are comprised of pension and other post-retirement components. Pension and other post retirement reclassifications are related to the amortization of prior service costs, and amortization of actuarial losses. Amounts reclassified out of AOCL are summarized below (in thousands):
 
Quarter ended June 30,
 
Six months ended June 30,
 
 
2020
 
2019
 
2020
 
2019
 
 
 
 
 
 
 
 
 
 
Amortization of prior service credit, net
$
(131
)
 
$
(115
)
 
$
(240
)
 
$
(240
)
 
Amortization of actuarial loss
1,735

 
1,552

 
3,342

 
3,102

 
Pension payment timing related charges
—

 
686

 
—

 
686

 
Total reclassifications, before tax
1,604

 
2,123

 
3,102

 
3,548

 
Income tax effect
(403
)
 
(532
)
 
(780
)
 
(888
)
 
Total reclassifications, net of tax
$
1,201

 
$
1,591

 
$
2,322

 
$
2,660