Ownership Percentage by Parent and Related Parties

No definition available.

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- Definition

Related Party Transaction, Annual Management Fee, Rate

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction, Termination Fee Calculation Period

+ References

No definition available.

+ Details

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- Definition

Related party Transaction, Termination Notice Period

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction, Termination Fee Multiplier - for "three times the sum of the average annual base management fee", 24-month should be then included in documentation of this concept.

+ References

No definition available.

+ Details

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- Definition

Related Party Transaction, Voting Requirement to Termination Management Agreement, Percentage

+ References

No definition available.

+ Details

Name:	ari_RelatedPartyTransactionVotingRequirementtoTerminationManagementAgreementPercentage
Namespace Prefix:	ari_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of obligations due all related parties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.17)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 17

-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(3),(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 3, 4

-Article 9

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
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Balance Type:	na
Period Type:	instant

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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Balance Type:	debit
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Related Party Transactions - Additional Information (Details) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended													9 Months Ended
	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Limited Liability Company [Member]	Dec. 31, 2014 Limited Liability Company [Member] Management Fees [Member] USD ($)	Dec. 31, 2013 Limited Liability Company [Member] Management Fees [Member] USD ($)	Dec. 31, 2012 Limited Liability Company [Member] Management Fees [Member] USD ($)	Dec. 31, 2014 Limited Liability Company [Member] Reimbursements [Member] USD ($)	Dec. 31, 2013 Limited Liability Company [Member] Reimbursements [Member] USD ($)	Dec. 31, 2012 Limited Liability Company [Member] Reimbursements [Member] USD ($)	Sep. 30, 2014 Champ Limited Partnership [Member]	Sep. 30, 2014 Champ Limited Partnership [Member] Subsidiaries [Member]	Sep. 30, 2014 KBC Bank Deutschland AG [Member] Champ LP [Member]	Sep. 30, 2014 KBCD Partnership [Member] USD ($)	Sep. 30, 2014 KBCD Partnership [Member] EUR (€)	Sep. 30, 2013 KBCD Partnership [Member]	Sep. 30, 2013 Commitment to Invest in KBCD [Member] USD ($)	Sep. 30, 2013 Commitment to Invest in KBCD [Member] EUR (€)
Related Party Transaction [Line Items]
Rate of management fees												1.50%
Voting requirement to termination management agreement, percentage												66.66%
Period of termination												180 days
Period to be considered, for average annual base management fee												3
Termination fee calculation period												24 months
Related party expenses	$ 3,236	$ 3,193	$ 2,966	$ 2,565	$ 2,627	$ 2,625	$ 2,600	$ 2,160	$ 11,960	$ 10,012	$ 6,139		$ 11,960	$ 10,012	$ 6,139	$ 985	$ 745	$ 987
Base management fees incurred but not yet paid	3,240				2,628				3,240	2,628			3,240	2,628
Indirect ownership interest from limited partnership																				59.00%	35.00%	21.00%	21.00%	21.00%
Initial funding for equity method investment									39,477	0	0											39,477	30,724
Commitment to invest																									$ 50,000	€ 38,000
Company and affiliated investors ownership, percentage																			100.00%		100.00%