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Subsequent events	3 Months Ended
Subsequent events	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent events	Subsequent events In April 2017, we completed the redemption of all 5.2 million outstanding shares of our Series E Redeemable Preferred Stock. Refer to Note 12 – “Stockholders’ Equity” to these unaudited consolidated financial statements for further discussion. During April 2017, we executed three interest rate swap agreements, with notional amounts aggregating $250 million at a weighted-average fixed pay rate of 1.71%. Two interest rate swap agreements were executed with an aggregate notional amount of $150 million at a fixed pay rate of 1.60%, effective March 29, 2018, along with one swap agreement executed with a notional amount of $100 million at a fixed pay rate of 1.89%, effective March 29, 2019.