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Summary of Operations and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Component of Comprehensive Income

As of December 31, the accumulated balance for each component of comprehensive income is as follows:

 

 

2020

 

 

2019

 

Unrealized foreign currency losses

$

(21,614

)

 

$

(63,053

)

Unrealized gain on cross currency and interest rate swaps, net of tax

$

(3,574

)

 

$

(391

)

Unrealized loss on defined benefit plan

$

(48,418

)

 

$

(44,695

)