Earnings Per Share (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Weighted average nonvested restricted shares outstanding	3,600,000	3,500,000	3,700,000
Anti-dilutive common stock shares excluded from earnings per share amount	5,750,000
Weighted average number of OP units outstanding	352,000	378,000	433,000