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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block] Long-term debt consists of the following:
 
March 31, 2019
 
December 31, 2018
Revolving line of credit
$
269,000

 
$
312,000

Term loan, net of deferred debt issuance costs of $1,826 and $311 in 2019 and 2018, respectively
263,174

 
144,064

2.625% convertible notes, net of deferred debt issuance costs of $10,508 and unamortized discount of $50,105 in 2019
284,387

 

Financing leases
543

 

Mortgage notes
836

 
836

Total debt
817,940

 
456,900

Less:  Current portion
14,385

 
18,336

Total long-term debt
$
803,555

 
$
438,564

Schedule of Maturities of Long-term Debt [Table Text Block] The scheduled maturities of long-term debt outstanding at March 31, 2019 are as follows:

Remaining, 2019
$
10,773

2020
13,250

2021
18,219

2022
24,844

2023
467,750

2024
345,000