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MAALP Capital (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Limited Partners' Capital Account [Member] |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |
Beginning Balance | $ 165,726 | $ 161,310
Net Income Allocated to Limited Partners | 4,881 | 10,984
General partner units issued in exchange for limited partner units | (158) | (184)
Adjustment for noncontrolling interest ownership in operating partnership | (54) | (45)
Distributions | (6,820) | (6,449)
Ending Balance | 163,575 | 165,616
General Partners' Capital Account [Member] |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |
Beginning Balance | 2,993,696 | 2,890,858
Net Income Allocated to General Partners | 88,557 | 197,566
Issuance of units | 186 | 184
Units repurchased and retired | (1,742) | (945)
Units Issued During Period, Value, Unit Options Exercised |  | 420
General partner units issued in exchange for limited partner units | 158 | 184
Units issued in exchange for redeemable units | 123 |
Redeemable stock fair market value | (1,518) | 173
Adjustment for noncontrolling interest ownership in operating partnership | 54 | 45
Amortization of unearned compensation | 4,383 | 3,167
Distributions | (123,852) | (116,066)
Ending Balance | 2,960,045 | 2,975,586
Accumulated Other Comprehensive Income (Loss) [Member] |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |
Beginning Balance | (1,618) | (376)
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) | (2,702) | 1,440
Ending Balance | (4,320) | 1,064
Total Partnership Capital [Member] |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |
Beginning Balance | 3,157,804 | 3,051,792
Net Income Available for Common Unitholders | 93,438 | 208,550
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) | (2,702) | 1,440
Issuance of units | 186 | 184
Units repurchased and retired | (1,742) | (945)
Units Issued During Period, Value, Unit Options Exercised |  | 420
General partner units issued in exchange for limited partner units | 0 | 0
Units issued in exchange for redeemable units | 123 |
Redeemable stock fair market value | (1,518) | 173
Adjustment for noncontrolling interest ownership in operating partnership | 0 | 0
Amortization of unearned compensation | 4,383 | 3,167
Distributions | (130,672) | (122,515)
Ending Balance | $ 3,119,300 | $ 3,142,266

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