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Other comprehensive (loss) income (Tables)
 6 Months Ended
Jun. 30, 2015
Equity [Abstract]  
Schedule of Changes in the Balances of Each Component of Other Comprehensive (Loss) Income
Changes in the balances of each component of other comprehensive (loss) income and the related tax effects are as follows:

 
For the Three Months Ended 
 June 30, 2015
 
For the Three Months Ended 
 June 30, 2014
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
($000 omitted)
 
($000 omitted)
Foreign currency translation adjustments
2,514

271

2,243

 
6,037

1,908

4,129

Unrealized (losses) gains on investments:
 
 
 
 
 
 
 
Change in unrealized (losses) gains on investments
(10,308
)
(3,608
)
(6,700
)
 
5,702

1,996

3,706

Less: reclassification adjustment for net gains included in net income
(201
)
(70
)
(131
)
 
(96
)
(34
)
(62
)
  Net unrealized (losses) gains
(10,509
)
(3,678
)
(6,831
)
 
5,606

1,962

3,644

 
 
 
 
 
 
 
 
Other comprehensive (loss) income
(7,995
)
(3,407
)
(4,588
)
 
11,643

3,870

7,773

 
 
 
 
 
 
 
 
 
For the Six Months Ended 
 June 30, 2015
 
For the Six Months Ended 
 June 30, 2014
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
Before-Tax Amount
Tax Expense (Benefit)
Net-of-Tax Amount
 
($000 omitted)
 
($000 omitted)
Foreign currency translation adjustments
(6,428
)
(2,172
)
(4,256
)
 
1,898

177

1,721

Unrealized (losses) gains on investments:
 
 
 
 
 
 
 
Change in unrealized (losses) gains on investments
(6,063
)
(2,122
)
(3,941
)
 
12,103

4,236

7,867

Less: reclassification adjustment for net gains included in net income
(1,203
)
(421
)
(782
)
 
(298
)
(105
)
(193
)
  Net unrealized (losses) gains
(7,266
)
(2,543
)
(4,723
)
 
11,805

4,131

7,674

 
 
 
 
 
 
 
 
Other comprehensive (loss) income
(13,694
)
(4,715
)
(8,979
)
 
13,703

4,308

9,395