Segment Information (Net Sales by Region or Origin and Long-Lived Assets by Region of Domicile) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 231,838	$ 272,734	$ 265,738	$ 237,671	$ 282,093	$ 304,994	$ 253,171	$ 200,615	$ 1,007,981	$ 1,040,873	$ 862,087
Long-lived assets	112,226				122,947				112,226	122,947	131,781
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									963,797	968,414	816,473
Long-lived assets	108,334				110,571				108,334	110,571	122,824
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									19,447	48,216	45,614
Long-lived assets	2,900				11,084				2,900	11,084	8,957
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									24,737	24,243	0
Long-lived assets	$ 992				$ 1,292				$ 992	$ 1,292	$ 0