Fees paid to related party for termination of advisory agreement.

No definition available.

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- Definition

Prepaid advisory fees written off in connection with the termination of a contract.

+ References

No definition available.

+ Details

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

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Balance Type:	debit
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- Definition

The month and year (YYYY-MM) that the dividend to be paid was declared.

+ References

+ Details

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
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- Definition

The loss recognized on termination of a contract.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 912

-SubTopic 275

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6471736&loc=d3e54681-109401

+ Details

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Balance Type:	debit
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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ 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 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

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- 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

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Related-Party Transactions - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended							0 Months Ended
	Mar. 31, 2012	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 05, 2015	Mar. 31, 2014	Jun. 30, 2014	May 31, 2014	Sep. 30, 2014	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013	Jan. 03, 2014	Oct. 01, 2013	Jul. 01, 2013	Apr. 24, 2013	Jan. 22, 2015	Apr. 01, 2014	Jul. 01, 2014	Oct. 06, 2014
Related Party Transaction [Line Items]
Cash dividends declared per share			$ 0.62	$ 0.60	$ 6.07
Dividends paid to stockholders			$ 72,113,000us-gaap_PaymentsOfDividendsCommonStock	$ 36,175,000us-gaap_PaymentsOfDividendsCommonStock	$ 502,977,000us-gaap_PaymentsOfDividendsCommonStock
Dividend declared to stockholders	500,000,000us-gaap_DividendsCommonStockCash		54,345,000us-gaap_DividendsCommonStockCash	53,911,000us-gaap_DividendsCommonStockCash	500,000,000us-gaap_DividendsCommonStockCash
Termination of advisory agreement		50,072,000us-gaap_LossOnContractTermination		50,072,000us-gaap_LossOnContractTermination
Subsequent Events [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share						$ 0.21
Cash dividends record date						Jan. 13, 2015
Cash dividends paid date						Jan. 22, 2015
Q1 2014 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share							$ 0.20
Cash dividends record date			Mar. 20, 2014
Cash dividends paid date			Apr. 01, 2014
Cash dividends declare date			2014-03
Q2 2014 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share								$ 0.21	$ 0.21
Cash dividends record date			Jun. 20, 2014
Cash dividends paid date			Jul. 01, 2014
Cash dividends declare date			2014-05
Q3 2014 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share										$ 0.21
Cash dividends record date			Sep. 29, 2014
Cash dividends paid date			Oct. 06, 2014
Cash dividends declare date			2014-09
Q2 2013 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share											$ 0.20
Cash dividends record date			Jun. 20, 2013
Cash dividends paid date			Jul. 01, 2013
Cash dividends declare date			2013-06
Q3 2013 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share												$ 0.20
Cash dividends record date			Sep. 20, 2013
Cash dividends paid date			Oct. 01, 2013
Cash dividends declare date			2013-09
Q4 2013 Declaration [Member]
Related Party Transaction [Line Items]
Cash dividends declared per share													$ 0.20
Cash dividends record date			Dec. 20, 2013
Cash dividends paid date			Jan. 03, 2014
Cash dividends declare date			2013-12
Blackstone and Affiliates [Member]
Related Party Transaction [Line Items]
Dividends paid to stockholders														7,849,000	11,749,000	11,749,000
Dividend declared to stockholders	500,000,000
Advisory Agreement, fees			0	2,799,000	6,201,000
Termination fee paid																	46,300,000
Write-off of 2013 prepaid advisory fee																	3,772,000
Termination of advisory agreement																	50,072,000
Blackstone and Affiliates [Member] \| Subsequent Events [Member]
Related Party Transaction [Line Items]
Dividends paid to stockholders																		4,095,000
Blackstone and Affiliates [Member] \| Q1 2014 Declaration [Member]
Related Party Transaction [Line Items]
Dividends paid to stockholders																			7,849,000
Blackstone and Affiliates [Member] \| Q2 2014 Declaration [Member]
Related Party Transaction [Line Items]
Dividends paid to stockholders																				4,252,000
Blackstone and Affiliates [Member] \| Q3 2014 Declaration [Member]
Related Party Transaction [Line Items]
Dividends paid to stockholders																					$ 4,095,000