Earnings Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				2,000
Denominator - basic (in shares)	166,607,000	150,913,000	164,088,000	149,704,000
Deemed shares related to deferred compensation arrangements (in shares)	0	41,000	0	42,000
Denominator - diluted (in shares)	166,607,000	150,954,000	164,088,000	149,746,000