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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Schedule of Accumulated Other Comprehensive Income
The components of accumulated other comprehensive income as of December 31 are as follows:
 
 
2012
 
2011
 
 
(dollars in thousands)
Foreign currency translation adjustments
 
$
53,380

 
$
49,450

Unrecognized prior service cost and unrecognized loss in actuarial assumptions
 
(12,440
)
 
(9,870
)
Unrealized loss on derivatives
 
(1,680
)
 
—

Accumulated other comprehensive income
 
$
39,260

 
$
39,580

 
 
Pension Benefit
 
Postretirement Benefit
 
 
2012
 
2011
 
2012
 
2011
 
 
(dollars in thousands)
Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
Unrecognized prior-service cost
 
$
130

 
$
130

 
$
—

 
$
(1,530
)
Unrecognized net loss/(gain)
 
19,430

 
17,280

 
(570
)
 
(680
)
Total accumulated other comprehensive income (loss) recognized at December 31
 
$
19,560

 
$
17,410

 
$
(570
)
 
$
(2,210
)