Commitments and Contingencies (Award Proceedings in Relation to Domination Agreement and Squeeze-Out Narrative) (Details) (USD $)	Jun. 30, 2011
Loss Contingencies [Line Items]
Number of legal actions	2
Squeeze-out compensation, per share	$ 66.99
Maximum [Member] | Domination Agreement and Squeeze-Out [Member]
Loss Contingencies [Line Items]
Shares subject to adjustment	1,069,465
Minimum [Member] | Domination Agreement and Squeeze-Out [Member]
Loss Contingencies [Line Items]
Shares subject to adjustment	924,078