Summary of significant accounting (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Tax Treatment Of Dividends And Distributions Table

During the years ended December 31, 2016, 2015 and 2014, our tax treatment of common stock distributions were as follows (unaudited):

	2016		2015		2014
Tax status of Common Shares distributions deemed paid during the year:
Ordinary income	$	1.471	$	1.169	$	1.217
Nondividend distributions	0.179		0.081		—
Distributions declared per Common Share outstanding	$	1.650	$	1.250	$	1.217