Accounts Receivable and Other Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$ 61,045	$ 43,969
Less: allowance for doubtful accounts	(103)	(124)
Accounts Receivable, Net	60,942	43,845
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts, beginning of the year	124	348	$ 779
Charged to costs and expenses	(17)	(75)	(310)
Less: write-offs, net of recoveries	(4)	(149)	(121)
Remaining allowance, end of the year	103	124	$ 348
Other receivables	$ 11,304	$ 6,324