Intangible Assets Summary of Intangile Asset Account Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Beginning balance, intangible assets, gross	$ 749,194,000	$ 759,152,000
Intangible assets acquired	43,400,000	12,797,000
Assets transferred to held for sale	0	(4,964,000)
Assets no longer in use written-off	(100,000)	(8,450,000)
Effect of change in exchange rates	10,046,000	(9,341,000)
Ending balance, intangible assets, gross	802,540,000	749,194,000
Water Operating Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Asset, Net Amount, Transferred to Held for Sale		$ 2,600,000