Senior Notes Payable - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2012
Mortgage Notes Payable [Line Items]
Senior notes payable	$ 86,250,000	$ 86,250,000	$ 86,250,000
Senior notes issued percentage			7.75%
Senior notes issue price			100.00%
Net proceeds	83,228,000
Payments of underwriting discounts, commissions and offering expenses	$ 3,022,000
Maturity period of the assumed debt	Aug. 15, 2022
Notes interest rate	7.75%
Redemption price of notes	100.00%
Senior Notes [Member]
Mortgage Notes Payable [Line Items]
Consolidated leverage ratio	60.00%

Consolidated Leverage Ratio

No definition available.

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- Definition

Senior notes issued percentage.

+ References

No definition available.

+ Details

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- Definition

Senior notes issue price.

+ References

No definition available.

+ Details

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- Definition

Reflects the effective interest rate as of the balance sheet date on interest-bearing trade payables.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 25

-Paragraph 13

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.22(a)(2))

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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- Definition

The cash inflow from issuance of trust preferred securities, net of the cash outflow for repurchasing trust preferred securities, by a business trust or other special purpose entity, mainly established by a bank holding entity, to third party investors. The trust's assets are deeply subordinated debentures of the bank holding entity. Most trust preferred securities are subject to a mandatory redemption upon the repayment of the debentures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 210

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-Subparagraph (SX 210.7-03.16(a))

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