Net Income Per Share (Narrative) (Details)	3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2012 Restricted Shares/Units [Member]	Jun. 30, 2012 Performance Vesting RSUs [Member]	Jun. 30, 2012 Performance Vesting RSUs [Member]
Number of shares used to compute basic and diluted EPS	69,161,000	69,161,000
Number of shares received in new company from spinoff transaction	1	1
Number of prior company shares held to receive one share in new company, from spinoff transaction	4	4
Antidilutive securities excluded from EPS			334,000	231,000	231,000