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Share-Based Payments Summary of Grants, Exchanges and Forfeitures of Restricted Stock and RSUs (Detail) (LTIP [Member], USD $)	1 Months Ended						12 Months Ended		1 Months Ended											12 Months Ended
	Nov. 30, 2013 Restricted Stock [Member]	Apr. 30, 2013 Restricted Stock [Member]	Feb. 28, 2013 Restricted Stock [Member]	Aug. 31, 2012 Restricted Stock [Member]	Apr. 30, 2012 Restricted Stock [Member]	Apr. 30, 2011 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2010 Restricted Stock [Member]	Sep. 30, 2013 RSU Vesting [Member]	Jul. 31, 2013 RSU Vesting [Member]	Jun. 30, 2013 RSU Vesting [Member]	May 31, 2013 RSU Vesting [Member]	Feb. 28, 2013 RSU Vesting [Member]	Oct. 31, 2012 RSU Vesting [Member]	Mar. 31, 2012 RSU Vesting [Member]	Feb. 29, 2012 RSU Vesting [Member]	Dec. 31, 2011 RSU Vesting [Member]	Aug. 31, 2011 RSU Vesting [Member]	Apr. 30, 2011 RSU Vesting [Member]	Dec. 31, 2013 RSU Vesting [Member]	Dec. 31, 2010 RSU Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture/Canceled										(5,000)	(5,000)			112,084		(1,875)	(30,000)
Grant	5,000	11,304	20,000	1,496	9,584	9,204	208,416	151,828	10,000			15,000	180,000		20,000			308,750	5,000	503,750	118,959
Estimated Fair Value on Grant Date, Exchange	$ 81,000	$ 200,000	$ 352,000	$ 25,000	$ 150,000	$ 150,000			$ 154,000			$ 264,000	$ 3,166,000		$ 310,000			$ 4,586,000	$ 82,000

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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