Common Stock (Narrative) (Details) - $ / shares	12 Months Ended			21 Months Ended	40 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Apr. 14, 2014
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)	162,529,811	162,181,939		162,529,811
Dividends declared per common share (in usd per share)	$ 0.46	$ 0.490	$ 0.605	$ 0.46	$ 0.605
Dividends declared per day (in usd per share)					$ 0.0016575342
Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)	162,529,811	162,181,939		162,529,811