Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Interest rate of interest rate derivative instrument.

+ References

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- Definition

Maturity date of interest rate swap

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- Definition

Portion of debt instrument face amount.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4D

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

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- Definition

Amount of gain (loss) from the ineffectiveness of the hedge.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)(1)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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- Definition

The fair value, as of the date of each statement of financial position presented, of other assets which are owned but transferred to serve as collateral for the payment of the related debt obligation, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

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Debt - Interest Rate Swap - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2010	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Oct. 31, 2011
Interest Rate Contract [Member]
Debt Instrument [Line Items]
Fair value of the interest rate swaps	$ 4,000,000			$ 4,000,000		$ 6,000,000
Interest Rate Contract One [Member]
Debt Instrument [Line Items]
Interest rate of interest rate derivative instrument	5.507%			5.507%
Maturity date of interest rate swap				July 2016
Interest Rate Contract Two [Member]
Debt Instrument [Line Items]
Maturity date of interest rate swap				October 2016
Interest rate swap, amount fixed							$ 60,000,000
Interest rate of derivative instrument				5.675%
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Hedge ineffectiveness and income statement effect in period	$ 0	$ 0		$ 0	$ 0
Other assets, collateral	$ 2,100,000			$ 2,100,000		$ 3,300,000
2006 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Portion of debt instrument face amount			$ 65,000,000