The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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- Definition

The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Common Stock and Preferred Stock - Schedule of Mandatorily Redeemable Convertible Preferred Stock (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized	8,978,672	8,978,672
Shares Outstanding	0	8,118,240
Series A Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Outstanding		557,339	557,339	557,339
Book Value		$ 15,605	$ 14,383	$ 13,250
Series B Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Outstanding		515,836	515,836	515,836
Book Value		13,865	12,793	11,800
Series C Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Outstanding		3,551,060	3,551,060	3,551,060
Book Value		38,592	35,614	32,837
Series D Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Outstanding		2,430,054	2,430,054
Book Value		20,323	18,167
Series E Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Outstanding		1,063,951
Book Value		15,237
Mandatorily Redeemable [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		8,978,672
Shares Outstanding		8,118,240
Liquidation Preference		113,970
Book Value		103,622
Mandatorily Redeemable [Member] \| Series A Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		564,083
Shares Outstanding		557,339
Liquidation Preference		15,628
Book Value		15,605
Mandatorily Redeemable [Member] \| Series B Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		520,839
Shares Outstanding		515,836
Liquidation Preference		14,045
Book Value		13,865
Mandatorily Redeemable [Member] \| Series C Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		3,659,375
Shares Outstanding		3,551,060
Liquidation Preference		38,709
Book Value		38,592
Mandatorily Redeemable [Member] \| Series D Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		3,125,000
Shares Outstanding		2,430,054
Liquidation Preference		22,510
Book Value		20,323
Mandatorily Redeemable [Member] \| Series E Preferred Stock [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Shares Authorized		1,109,375
Shares Outstanding		1,063,951
Liquidation Preference		23,078
Book Value		$ 15,237