CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities
Net loss	$ (130,709)us-gaap_ProfitLoss	$ (2,299)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash provided by operating activities:
Debt modification and extinguishment costs	44	0
Depreciation and amortization	220,808	74,334
Equity in earnings of unconsolidated ventures	(1,484)	(636)
Distributions from unconsolidated ventures from cumulative share of net earnings	500	245
Amortization of deferred gain	(1,093)	(1,093)
Amortization of entrance fees	(767)us-gaap_RecognitionOfDeferredRevenue	(7,202)us-gaap_RecognitionOfDeferredRevenue
Proceeds from deferred entrance fee revenue	2,455	9,035
Deferred income tax (benefit) provision	(79,237)us-gaap_DeferredIncomeTaxExpenseBenefit	598us-gaap_DeferredIncomeTaxExpenseBenefit
Change in deferred lease liability	2,801bkd_ChangeInDeferredLeaseLiability	(223)bkd_ChangeInDeferredLeaseLiability
Change in fair value of derivatives	550us-gaap_UnrealizedGainLossOnDerivatives	847us-gaap_UnrealizedGainLossOnDerivatives
Loss on sale of assets	0	76
Non-cash stock-based compensation	8,873	7,572
Non-cash interest expense on financing leases	5,700us-gaap_AmortizationOfFinancingCosts	0us-gaap_AmortizationOfFinancingCosts
Amortization of (above) below market rents, net	(1,959)	0
Changes in operating assets and liabilities:
Accounts receivable, net	(13,140)	(2,499)
Prepaid expenses and other assets, net	24,504	(5,816)
Accounts payable and accrued expenses	(38,773)	(27,561)
Tenant refundable fees and security deposits	(510)	(615)
Deferred revenue	11,494	7,933
Net cash provided by operating activities	10,057	52,696
Cash Flows from Investing Activities
Decrease in lease security deposits and lease acquisition deposits, net	13,037us-gaap_IncreaseDecreaseInOtherDeposits	7us-gaap_IncreaseDecreaseInOtherDeposits
Decrease in cash and escrow deposits - restricted	12,289	6,627
Additions to property, plant and equipment and leasehold intangibles, net	(79,129)	(59,717)
Acquisition of assets, net of related payables and cash received	(174,305)	(515)
Payments on notes receivable, net	740	76
Investment in unconsolidated ventures	(3,923)	0
Net cash used in investing activities	(231,291)	(53,522)
Cash Flows from Financing Activities
Proceeds from debt	85,365	20,516
Repayment of debt and capital and financing lease obligations	(47,555)	(22,401)
Proceeds from line of credit	445,000	70,000
Repayment of line of credit	(245,000)	(75,000)
Payment of financing costs, net of related payables	(1,481)us-gaap_PaymentsOfDebtIssuanceCosts	(2,905)us-gaap_PaymentsOfDebtIssuanceCosts
Refundable entrance fees:
Proceeds from refundable entrance fees	36	5,924
Refunds of entrance fees	(829)	(8,446)
Cash portion of loss on extinguishment of debt	(44)	0
Payment on lease termination	(3,875)	0
Other	716	328
Net cash provided by (used in) financing activities	232,333	(11,984)
Net increase (decrease) in cash and cash equivalents	11,099	(12,810)
Cash and cash equivalents at beginning of period	104,083	58,511
Cash and cash equivalents at end of period	$ 115,182	$ 45,701

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

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- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

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- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4K

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

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- Definition

The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1)

-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

-Subsection 1

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations.

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c).

+ References

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- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

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