Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Measurements

Schedule of fair value of assets and liabilities measured on a recurring basis

	Fair Value at September 30, 2018								Fair Value at December 31, 2017
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Contingent Consideration	$	—	$	—	$	200	$	200	$	—	$	—	$	133	$	133

Schedule of reconciliation of the beginning and ending balance for the Level 3 measurement

(in thousands)
Balance at December 31, 2017	$	133
Addition		67
Balance at September 30, 2018	$	200

Schedule of fair value of debt instruments

	September 30, 2018				December 31, 2017
	Carrying		Fair		Carrying		Fair
(in thousands)	Value		Value		Value		Value
Original Notes - 7.625% (1)	$	422,709	$	425,531	$	421,772	$	426,063
Add-on Notes - 7.625% (2)		223,201		220,275		224,338		220,550

(1) The carrying value of the Original Notes - 7.625% is net of unamortized deferred financing costs of $2.3 and $3.2 million as of September 30, 2018 and December 31, 2017, respectively.

(2) The carrying value of the Add-on Notes - 7.625% is net of unamortized deferred financing costs of $1.0 and $1.3 million as of September 30, 2018 and December 31, 2017, respectively, and includes unamortized bond premium of $4.2 and $5.7 million as of September 30, 2018 and December 31, 2017, respectively.