Additional Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in operating assets and liabilities, net of effect of businesses acquired [Abstract]
Accounts receivable	$ (4,120)	$ (11,250)	$ (731)
Inventories	13,760	(30,302)	(23,753)
Prepaid expenses and other current assets	(12,180)	(5,203)	(5,031)
Accounts payable	17,839	(13,419)	9,339
Other current liabilities	(19,505)	32,925	(18,064)
Net change in operating assets and liabilities	$ (4,206)	$ (27,249)	$ (38,240)