Segment Information Revenues and Operating Net Assets by Geographical Areas (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating Net Assets	$ 1,039,270	$ 883,760	$ 765,560
Continuing Operations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	1,394,860	1,272,910	1,083,960
Operating Net Assets	1,039,270	883,760	765,560
Continuing Operations [Member] | Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	97,500	62,400	68,820
Operating Net Assets	136,490	102,250	113,950
Continuing Operations [Member] | Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	97,580	100,620	88,640
Operating Net Assets	27,080	32,400	30,870
Continuing Operations [Member] | Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	44,870	32,230	9,500
Operating Net Assets	59,120	38,130	30,630
Continuing Operations [Member] | Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	3,310	4,180	950
Operating Net Assets	4,770	3,090	2,990
Continuing Operations [Member] | Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	46,210	34,090	29,600
Operating Net Assets	83,080	68,660	38,660
Continuing Operations [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	289,470	233,520	197,510
Operating Net Assets	310,540	244,530	217,100
Continuing Operations [Member] | Total U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	1,105,390	1,039,390	886,450
Operating Net Assets	$ 728,730	$ 639,230	$ 548,460