COMMITMENTS AND CONTINGENCIES: (Tables)

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum payments under non-cancelable operating and capital leases

At March 31, 2017, future minimum payments under non-cancelable operating leases are as follows:

	(in thousands)
2017 (remaining nine months)	$	17,050
2018	18,569
2019	13,553
2020	11,466
2021	8,093
Thereafter	10,388
Total minimum lease payments	$	79,119

Purchase commitment, excluding long-term commitment

At March 31, 2017, the Company had the following non-cancelable purchase commitments:

	(in thousands)
2017 (remaining nine months)	$	116,229
2018	3,400
2019	610
2020	154
2021	51
Thereafter	—
	$	120,444