Annual report pursuant to Section 13 and 15(d)

Cash Distribution and Dividends (Details)

v3.20.4
Cash Distribution and Dividends (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 20, 2021
Nov. 13, 2020
Nov. 12, 2020
Aug. 14, 2020
Aug. 12, 2020
May 15, 2020
May 12, 2020
Feb. 14, 2020
Feb. 12, 2020
Dec. 31, 2019
Nov. 14, 2019
Nov. 13, 2019
Sep. 18, 2019
Aug. 07, 2019
May 15, 2019
May 08, 2019
Feb. 21, 2019
Nov. 21, 2018
Aug. 22, 2018
May 23, 2018
Feb. 20, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Partnership equity and distributions                                                
Cash dividends declared per common share $ 0.3075                                              
Common shareholders                                                
Partnership equity and distributions                                                
Distributions     $ 146,581   $ 146,664   $ 147,519   $ 148,876     $ 153,033   $ 154,146   $ 152,082 $ 30,543 $ 26,817 $ 23,276 $ 20,109 $ 13,964 $ 590,190 $ 492,477 $ 84,166
Distributions per share (in dollars per share)     $ 0.3075   $ 0.3075   $ 0.3075   $ 0.3075     $ 0.3075   $ 0.3075   $ 0.3025 $ 0.164 $ 0.144 $ 0.125 $ 0.108 $ 0.075      
Exchanged B Units | Common shareholders                                                
Partnership equity and distributions                                                
Distributions                   $ 2,299                            
Series A Preferred Stock                                                
Partnership equity and distributions                                                
Cash dividend declared $ 138                                              
Dividends in arrears                                           $ 69    
Series A Preferred Stock | Common shareholders                                                
Partnership equity and distributions                                                
Distributions   $ 137   $ 138   $ 137   $ 138     $ 138   $ 138   $ 98