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Long-Term Debt Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Our senior long-term debt consisted of the following at December 31, 2014 and 2015 (in thousands): 
 
December 31, 2014
 
December 31, 2015
Revolving credit facility, secured, floating rate
$
40,500

 
$
92,600

Term loan, secured, floating rate
120,312

 
110,937

Acquisition debt
1,205

 
4,929

Less: current portion
(9,630
)
 
(12,012
)
Total long-term debt
$
152,387

 
$
196,454
Schedule of Maturities of Long-term Debt
The aggregate maturities of our long-term debt for the next five years subsequent to December 31, 2015 and thereafter are as follows (in thousands):
Years ending December 31,
 
2016
$
12,012

2017
13,499

2018
15,184

2019
167,168

2020
383

2021 and thereafter
220

 
$
208,466

The aggregate maturities of our Convertible Notes for the five years subsequent to December 31, 2015 and thereafter are as follows (in thousands):
 
 
Principal Maturity
 
Discount Amortization
 
Present
 Value
Years ending December 31,
 
 
 
 
 
 
2016
 
$
—

 
$
(3,867
)
 
$
(3,867
)
2017
 
—

 
(4,328
)
 
(4,328
)
2018
 
—

 
(4,844
)
 
(4,844
)
2019
 
—

 
(5,422
)
 
(5,422
)
2020
 
—

 
(6,068
)
 
(6,068
)
2021 and thereafter
 
143,750

 
(1,225
)
 
142,525

 
 
$
143,750

 
$
(25,754
)
 
$
117,996