Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Accounts Receivable

	June 30, 2015			December 31, 2014
	(in thousands)
Accounts receivable	$	45,549		$	44,263
Less:  Allowance for doubtful accounts	(69		)	(171		)
Total, net	$	45,480		$	44,092

Allowance for Doubtful Accounts

	Three months ended					Six months ended
	June 30, 2015			June 30, 2014		June 30, 2015			June 30, 2014
Allowance for doubtful accounts:	(in thousands)
Balance, beginning of period	$	112		$	63	$	171		$	193
Provisions for losses on accounts receivables, net of recoveries	(43		)	115		(94		)	(15		)
Accounts receivable written off	—			7		(8		)	7
Balance, end of period	$	69		$	185	$	69		$	185