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CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL - USD ($) $ in Thousands | Limited Partners' Capital | General Partner's Capital (Deficit) | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interest | Total
--- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2016 | $ 1,400,202 | $ (273,788) | $ (38,540) | $ 5,550 | $ 1,093,424
Balance at beginning of period (in units) at Dec. 31, 2016 | 74,375,025 |  |  |  |
Comprehensive income: |  |  |  |  |
Net income | $ 281,734 | 21,904 |  | 563 | 304,201
Actuarially determined long-term liability adjustments |  |  | (13,400) |  | (13,400)
COMPREHENSIVE INCOME |  |  |  |  | 290,801
Settlement of deferred compensation plans | $ (2,988) |  |  |  | (2,988)
Settlement of deferred compensation plans (in units) | 222,011 |  |  |  |
Issuance of units to MGP in Exchange Transaction | $ 14,171 | (14,171) |  |  |
Issuance of units to MGP in Exchange Transaction (in units) | 56,100,000 |  |  |  |
Issuance of units to SGP in Exchange Transaction | $ (320,838) | 320,838 |  |  |
Issuance of units to SGP in Exchange Transaction (in units) | 7,181 |  |  |  |
Exchange Transaction fees | $ (1,605) |  |  |  | (1,605)
Contributions to consolidated company from affiliate noncontrolling interest |  |  |  | 251 | 251
Common unit-based compensation | 12,326 |  |  |  | 12,326
Distributions on deferred common unit-based compensation | (3,248) |  |  |  | (3,248)
General Partners contributions |  | 1,105 |  |  | 1,105
Distributions from consolidated company to affiliate noncontrolling interest |  |  |  | (1,016) | (1,016)
Distributions to Partners | (196,535) | (41,029) |  |  | (237,564)
Balance at end of period at Dec. 31, 2017 | $ 1,183,219 | 14,859 | (51,940) | 5,348 | 1,151,486
Balance at end of period (in units) at Dec. 31, 2017 | 130,704,217 |  |  |  |
Comprehensive income: |  |  |  |  |
Net income | $ 365,044 | 1,560 |  | 866 | 367,470
Actuarially determined long-term liability adjustments |  |  | 5,069 |  | 5,069
COMPREHENSIVE INCOME |  |  |  |  | 372,539
Settlement of deferred compensation plans | $ (2,745) |  |  |  | (2,745)
Settlement of deferred compensation plans (in units) | 199,039 |  |  |  |
Issuance of units to SGP in Exchange Transaction (in units) | 20,960 |  |  |  |
Issuance of units to Owners of SGP in Simplification Transactions | $ 14,742 | (15,106) |  |  | (364)
Issuance of units to Owners of SGP in Simplification Transactions (in units) | 1,322,388 |  |  |  |
Simplification Transactions fees | $ (96) |  |  |  | (96)
Contribution of units and cash by affiliated entity | $ 2,142 |  |  |  | 2,142
Contribution of units by affiliated entity (in units) | (467,018) |  |  |  |
Purchase of units under unit repurchase program | $ (70,604) |  |  |  | (70,604)
Purchase of units under unit repurchase program (in units) | (3,684,075) |  |  |  |
Common unit-based compensation | $ 12,114 |  |  |  | 12,114
Distributions on deferred common unit-based compensation | (3,855) |  |  |  | (3,855)
General Partners contributions |  | 41 |  |  | 41
Distributions from consolidated company to affiliate noncontrolling interest |  |  |  | (924) | (924)
Distributions to Partners | (270,693) | $ (1,354) |  |  | (272,047)
Balance at end of period at Dec. 31, 2018 | $ 1,229,268 |  | (46,871) | 5,290 | $ 1,187,687
Balance at end of period (in units) at Dec. 31, 2018 | 128,095,511 |  |  |  | 128,095,511
Comprehensive income: |  |  |  |  |
Net income | $ 399,414 |  |  | 7,512 | $ 406,926
Actuarially determined long-term liability adjustments |  |  | (31,122) |  | (31,122)
COMPREHENSIVE INCOME |  |  |  |  | 375,804
Settlement of deferred compensation plans | $ (7,817) |  |  |  | (7,817)
Settlement of deferred compensation plans (in units) | 596,650 |  |  |  |
Purchase of units under unit repurchase program | $ (22,892) |  |  |  | (22,892)
Purchase of units under unit repurchase program (in units) | (1,776,564) |  |  |  |
Common unit-based compensation | $ 11,934 |  |  |  | 11,934
Distributions on deferred common unit-based compensation | (3,670) |  |  |  | (3,670)
Distributions from consolidated company to affiliate noncontrolling interest |  |  |  | (867) | (867)
Distributions to Partners | (274,755) |  |  |  | (274,755)
Balance at end of period at Dec. 31, 2019 | $ 1,331,482 |  | $ (77,993) | $ 11,935 | $ 1,265,424
Balance at end of period (in units) at Dec. 31, 2019 | 126,915,597 |  |  |  | 126,915,597

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