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Other comprehensive (loss) income
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Other comprehensive (loss) income
Other comprehensive (loss) income. Changes in the balances of each component of other comprehensive (loss) income and the related tax effects are as follows:
 
Three Months Ended 
 June 30, 2018
 
Three Months Ended 
 June 30, 2017
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
($000 omitted)
Net unrealized (losses) gains on investments:
 
 
 
 
 
 
 
Change in net unrealized gains and losses on investments
(3,074
)
(646
)
(2,428
)
 
548

193

355

Less: reclassification adjustment for net gains included in net income
(292
)
(61
)
(231
)
 
(145
)
(51
)
(94
)
 
(3,366
)
(707
)
(2,659
)
 
403

142

261

Foreign currency translation adjustments
(4,575
)
(537
)
(4,038
)
 
4,334

1,130

3,204

Other comprehensive (loss) income
(7,941
)
(1,244
)
(6,697
)
 
4,737

1,272

3,465

 
 
 
 
 
 
 
 
 
Six Months Ended 
 June 30, 2018
 
Six Months Ended 
 June 30, 2017
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
($000 omitted)
Net unrealized (losses) gains on investments:
 
 
 
 
 
 
 
Change in net unrealized gains and losses on investments
(13,208
)
(2,774
)
(10,434
)
 
4,343

1,521

2,822

Less: reclassification adjustment for net gains included in net income
(607
)
(127
)
(480
)
 
(710
)
(249
)
(461
)
 
(13,815
)
(2,901
)
(10,914
)
 
3,633

1,272

2,361

Foreign currency translation adjustments
(6,854
)
(1,224
)
(5,630
)
 
6,014

1,485

4,529

Other comprehensive (loss) income
(20,669
)
(4,125
)
(16,544
)
 
9,647

2,757

6,890