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v3.8.0.1

Consolidated Statements of Capital - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance |  | $ 1,982,863 |  | $ 1,372,686 |  | $ 1,381,097 | $ 1,982,863 | $ 1,372,686 | $ 1,381,097
Issuance of OP units, net of costs |  |  |  |  |  |  |  | 611,206 |
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | 0 | 0 | 0
Equity compensation |  |  |  |  |  |  | 14,100 | 9,729 | 5,483
Distributions |  |  |  |  |  |  | (126,963) | (114,954) | (91,900)
Net income | $ 32,260 | $ 19,145 | $ 33,008 | $ 16,705 | $ 19,370 | $ 7,888 | 118,253 | 107,250 | 79,928
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  | (11,658) | (3,054) | (1,922)
Other comprehensive income (loss) |  |  |  |  |  |  | (10,516) | (3,054) | (1,922)
Ending balance | $ 1,977,737 |  | $ 1,982,863 |  | $ 1,372,686 |  | $ 1,977,737 | $ 1,982,863 | $ 1,372,686
General Partner [Member] | Series PR Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 155,841,000 |  | 120,023,000 |  | 107,191,000 | 155,841,000 | 120,023,000 | 107,191,000
Beginning balance |  | $ 1,154,136 |  | $ 524,729 |  | $ 468,638 | $ 1,154,136 | $ 524,729 | $ 468,638
Issuance of OP units, net (in units) |  |  |  |  |  |  |  | 29,611,000 |
Issuance of OP units, net of costs |  |  |  |  |  |  |  | $ 611,206 |
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital (in units) |  |  |  |  |  |  | 5,615,000 | 6,167,000 | 12,818,000
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | $ 23,435 | $ 23,678 | $ 62,070
Equity compensation (in units) |  |  |  |  |  |  | 21,000 | 40,000 | 14,000
Equity compensation |  |  |  |  |  |  | $ 468 | $ 357 | $ 296
Distributions |  |  |  |  |  |  | (66,789) | (55,812) | (39,183)
Net income |  |  |  |  |  |  | 62,647 | 51,456 | 33,730
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  |  | $ (1,478) | $ (822)
Other comprehensive income (loss) |  |  |  |  |  |  | $ (5,615) |  |
Ending balance (in units) | 161,477,000 |  | 155,841,000 |  | 120,023,000 |  | 161,477,000 | 155,841,000 | 120,023,000
Ending balance | $ 1,168,282 |  | $ 1,154,136 |  | $ 524,729 |  | $ 1,168,282 | $ 1,154,136 | $ 524,729
Limited Partner [Member] | Series PR Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 93,075,000 |  | 93,863,000 |  | 100,211,000 | 93,075,000 | 93,863,000 | 100,211,000
Beginning balance |  | $ 793,360 |  | $ 809,901 |  | $ 868,163 | $ 793,360 | $ 809,901 | $ 868,163
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital (in units) |  |  |  |  |  |  | (2,611,000) | (2,657,000) | (6,803,000)
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | $ (21,997) | $ (22,264) | $ (58,636)
Equity compensation (in units) |  |  |  |  |  |  | 1,296,000 | 1,869,000 | 455,000
Equity compensation |  |  |  |  |  |  | $ 13,632 | $ 9,372 | $ 5,187
Distributions |  |  |  |  |  |  | (38,969) | (37,621) | (32,794)
Net income |  |  |  |  |  |  | 35,430 | 34,977 | 28,678
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  |  | $ (1,005) | $ (697)
Other comprehensive income (loss) |  |  |  |  |  |  | $ (3,177) |  |
Ending balance (in units) | 91,760,000 |  | 93,075,000 |  | 93,863,000 |  | 91,760,000 | 93,075,000 | 93,863,000
Ending balance | $ 778,279 |  | $ 793,360 |  | $ 809,901 |  | $ 778,279 | $ 793,360 | $ 809,901
Limited Partner [Member] | Series ES Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 35,728,000 |  | 38,262,000 |  | 42,365,000 | 35,728,000 | 38,262,000 | 42,365,000
Beginning balance |  | $ 20,091 |  | $ 22,074 |  | $ 26,488 | $ 20,091 | $ 22,074 | $ 26,488
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital (in units) |  |  |  |  |  |  | (1,954,000) | (2,534,000) | (4,103,000)
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | $ (978) | $ (1,075) | $ (2,424)
Distributions |  |  |  |  |  |  | (14,477) | (14,642) | (13,495)
Net income |  |  |  |  |  |  | 13,726 | 14,140 | 11,792
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  |  | $ (406) | $ (287)
Other comprehensive income (loss) |  |  |  |  |  |  | $ (1,230) |  |
Ending balance (in units) | 33,774,000 |  | 35,728,000 |  | 38,262,000 |  | 33,774,000 | 35,728,000 | 38,262,000
Ending balance | $ 17,132 |  | $ 20,091 |  | $ 22,074 |  | $ 17,132 | $ 20,091 | $ 22,074
Limited Partner [Member] | Series 60 Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 9,701,000 |  | 10,318,000 |  | 11,546,000 | 9,701,000 | 10,318,000 | 11,546,000
Beginning balance |  | $ 4,880 |  | $ 5,366 |  | $ 6,567 | $ 4,880 | $ 5,366 | $ 6,567
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital (in units) |  |  |  |  |  |  | (713,000) | (617,000) | (1,228,000)
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | $ (310) | $ (218) | $ (654)
Distributions |  |  |  |  |  |  | (3,889) | (3,985) | (3,665)
Net income |  |  |  |  |  |  | 3,637 | 3,827 | 3,196
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  |  | $ (110) | $ (78)
Other comprehensive income (loss) |  |  |  |  |  |  | $ (326) |  |
Ending balance (in units) | 8,988,000 |  | 9,701,000 |  | 10,318,000 |  | 8,988,000 | 9,701,000 | 10,318,000
Ending balance | $ 3,992 |  | $ 4,880 |  | $ 5,366 |  | $ 3,992 | $ 4,880 | $ 5,366
Limited Partner [Member] | Series 250 Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 4,747,000 |  | 5,106,000 |  | 5,790,000 | 4,747,000 | 5,106,000 | 5,790,000
Beginning balance |  | $ 2,392 |  | $ 2,612 |  | $ 3,237 | $ 2,392 | $ 2,612 | $ 3,237
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital (in units) |  |  |  |  |  |  | (337,000) | (359,000) | (684,000)
Conversion of operating partnership units to Class A shares and Class B shares to ESRT partner's capital |  |  |  |  |  |  | $ (150) | $ (121) | $ (356)
Distributions |  |  |  |  |  |  | (1,903) | (1,958) | (1,827)
Net income |  |  |  |  |  |  | 1,877 | 1,914 | 1,596
Unrealized loss on valuation of interest rate swap agreements |  |  |  |  |  |  |  | $ (55) | $ (38)
Other comprehensive income (loss) |  |  |  |  |  |  | $ (168) |  |
Ending balance (in units) | 4,410,000 |  | 4,747,000 |  | 5,106,000 |  | 4,410,000 | 4,747,000 | 5,106,000
Ending balance | $ 2,048 |  | $ 2,392 |  | $ 2,612 |  | $ 2,048 | $ 2,392 | $ 2,612
Private Perpetual Preferred Units [Member] |  |  |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in units) |  | 1,560,000 |  | 1,560,000 |  | 1,560,000 | 1,560,000 | 1,560,000 | 1,560,000
Beginning balance |  | $ 8,004 |  | $ 8,004 |  | $ 8,004 | $ 8,004 | $ 8,004 | $ 8,004
Distributions |  |  |  |  |  |  | (936) | (936) | (936)
Net income |  |  |  |  |  |  | $ 936 | $ 936 | $ 936
Ending balance (in units) | 1,560,000 |  | 1,560,000 |  | 1,560,000 |  | 1,560,000 | 1,560,000 | 1,560,000
Ending balance | $ 8,004 |  | $ 8,004 |  | $ 8,004 |  | $ 8,004 | $ 8,004 | $ 8,004

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