Employee Benefits

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Employee Benefits

10. EMPLOYEE BENEFITS

401(k) Plans

The Operating Company sponsors a defined contribution savings plans for all employees. Under the defined contribution savings plan, the Operating Company matches voluntary contributions of participants up to a maximum contribution based upon a percentage of a participant’s salary with an additional matching contribution possible at the Partnership’s discretion. The expense under these plans for the three and six months ended June 30, 2018 and 2017 is included in Cost of operations and Selling, general and administrative expense in the Partnership’s unaudited condensed consolidated statements of operations and comprehensive income and was as follows:

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
	(in thousands)
401(k) plan expense	$	393	$	336	$	829	$	693