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Noncontrolling Interests (Redeemable Preferred Units) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 25, 2015 | May 12, 2014 | Dec. 31, 2014 | Nov. 05, 2014 | Oct. 16, 2014 | Jul. 03, 2014 | May 19, 2014
Series Two Preferred Units [Member] |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |
Units converted (in shares) |  |  | 666,116 |  |  |  |
Series Two Preferred Units [Member] | Noncontrolling Interests [Member] |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |
Liquidation preference percentage |  | 6.00% |  |  |  |  |
Operating Units liquidation preference (in dollars per share) |  | $ 38.10 |  |  |  |  |
OP Units for each Preferred Unit (in shares) |  | 1.312336 |  |  |  |  |
Units converted (in shares) |  | 666,116 |  |  |  |  |
Series Two Preferred Units On Converted Basis |  | 874,168 |  |  |  |  |
Preferred Units Liquidation Preference |  | $ 50.00 |  |  |  |  |
Series Four Preferred Units [Member] | Noncontrolling Interests [Member] |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |
Series Four Preferred Units Redeemed | 12,667 |  |  |  |  |  |
Series Four Preferred Units Released from Escrow |  |  |  |  | 27,773 |  | 319,687
Redemption of Series Four Preferred Units | $ 0.6 |  |  | $ 1.4 |  | $ 16.0 |
Series Four Preferred Units Annual Dividend Payable Rate | 2.00% |  |  |  |  |  |
Preferred Units Liquidation Preference | $ 50.00 |  |  |  |  |  |
OP Units [Member] |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |
Units converted (in shares) |  |  | 874,168 |  |  |  |

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