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Borrowings (Tables)
6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Schedule of Borrowings
Borrowings at June 30, 2018 and December 31, 2017 consisted of the following: 
 
June 30,
2018
 
December 31,
2017
Revolving Facility
$
10,409

 
$
10,740

4.5% Senior Notes, due December 2020
300,000

 
300,000

4.2% Senior Notes, due December 2021
350,000

 
350,000

3.2% Senior Notes, due June 2023
100,000

 
100,000

3.37% Senior Notes, due June 2025
100,000

 
100,000

Other borrowings
1,449

 
1,446

Total borrowings
861,858

 
862,186

Less current portion
496

 
258

Less deferred debt issuance costs
1,898

 
2,204

Less unaccreted debt discount
803

 
936

Total long-term borrowings
$
858,661

 
$
858,788