Minimum increases in stock price.

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Minimum percent annualized return on assets vesting for stock unit awards.

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No definition available.

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Number of share to be issued at stock price increase.

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No definition available.

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Number of shares to be issued at stock price decrease by fifty percent.

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No definition available.

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Percentage of decrease in stock price.

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No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Target Number Of Shares To Be Issued

+ References

No definition available.

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- Definition

Amount of commitment made to pay deferred cash remuneration.

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No definition available.

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Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

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No definition available.

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

+ 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 (k)
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Unrecognized cost of unvested share-based compensation awards.

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-SubTopic 10
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-Paragraph 2
-Subparagraph (i)
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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
-Subparagraph (i)
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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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-Section 45
-Paragraph 28
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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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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).

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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section 50
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-Subparagraph (c)(2)(i)-(ii)
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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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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-Paragraph 2
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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (c)(1)(i)-(ii)
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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

+ References

No definition available.

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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The amount that is required to be paid, determined under the conditions specified in the contract, if as of the reporting date, the holder of the share has exercised the right to or the shares are mandatorily redeemable after one year from the reporting date or operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
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-Paragraph 2
-Subparagraph (a)
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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Share Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		$ 4,246,000	$ 3,417,000	$ 16,809,000
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost		517,000	$ 760,000	590,000
Unrecognized share-based compensation expense related to non-vested equity-settled awards, restricted stock and stock options		$ 5,109,000
Weighted average period over which amount will be recognized		2 years
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		288,089	215,561
Vesting of restricted stock awards and exercises of stock options, shares withheld		51,521	55,238
Payroll taxes on restricted stock and stock options		$ 762,000	$ 1,043,000	1,137,000
Stock price of non-vested cash-settled awards		$ 10.94
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent	$ 17.50
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		$ 587,000
Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent		225,000
Board of Director Fees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		1,203,000	906,000	876,000
Cash Settled Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		(3,127,000)	(3,710,000)	7,774,000
Fair value of vested cash-settled awards		3,757,000	$ 9,560,000
Aggregate current value of non-vested cash-settled awards		$ 1,286,000
Cash Settled Awards [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		3 years
Cash Settled Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		4 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		3 years
Restricted Stock Units (RSUs) [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		3 years
Restricted Stock Units (RSUs) [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		4 years
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, weighted average grant date fair value		$ 12.97	$ 12.54
Aggregate current value of non-vested cash-settled restricted stock units		487,000	458,000
Fair value of awards settled in cash		$ 206,000	$ 1,181,000	3,458,000
Period over or after performance stock unit vest		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Granted, Equivalent Units		90,000
Market-leveraged stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		3 years
Granted, Equivalent Units		234,000
Number of shares to be issued if stock price increases by fifty percent		351,000
Numbers of shares to be issued if stock price decreases by fifty percent		117,000
Equity-settled awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		$ 5,026,000	$ 5,168,000	4,281,000
Unrecognized share-based compensation expense related to non-vested equity-settled awards, restricted stock and stock options		$ 3,258,000
Weighted average period over which amount will be recognized		2 years
Nonvested, weighted average grant date fair value		$ 18.25	$ 19.24
Aggregate current value of non-vested cash-settled restricted stock units		631,000	710,000
Fair value of vested cash-settled awards		$ 4,451,000,000	$ 3,119,000,000	8,000,000
Granted, Equivalent Units		395,000
Minimum increases in stock price		50.00%
Percentage of decrease in stock price		50.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		$ (8,000)	$ (25,000)	538,000
Unrecognized share-based compensation expense related to non-vested equity-settled awards, restricted stock and stock options		$ 14,000
Weighted average period over which amount will be recognized		1 year
Minimum Percent Annualized Return on Assets Vesting for Stock Unit Awards		1.00%
Nonvested, weighted average grant date fair value		$ 20.55	$ 17.56
Aggregate current value of non-vested cash-settled restricted stock units		4,000	17,000
Fair value of vested cash-settled awards		$ 88,000,000	$ 341,000,000	3,002,000,000
Period over or after performance stock unit vest		3 years
Granted, Equivalent Units		0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation		$ 2,355,000	1,984,000	4,216,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		0	21,000	1,355,000
Unrecognized share-based compensation expense related to non-vested equity-settled awards, restricted stock and stock options		$ 1,837,000
Weighted average period over which amount will be recognized		2 years
Period over or after performance stock unit vest	3 years	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years	10 years
Intrinsic value of options exercised		$ 0	$ 568,000	562,000
Options Outstanding		2,171,000	1,861,000
Weighted average exercise price		$ 20.83
Weighted Average Remaining Contractual Term		5 years	6 years
Aggregate intrinsic value		$ 156,000	$ 643,000
Cash Settled Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Percent Annualized Return on Assets Vesting for Stock Unit Awards		1.00%
Nonvested, weighted average grant date fair value		$ 16.00	$ 18.49
Aggregate current value of non-vested cash-settled restricted stock units		117,000	185,000
Fair value of awards settled in cash		$ 2,469,000	$ 2,286,000	3,780,000
Granted, Equivalent Units		60,000
Performance Stock Units Psu [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		3 years
Special Performance [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Special Performance Stock Unit awards to be issued		0
Pre Spin Stock Option Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period over or after performance stock unit vest		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Options Outstanding		44,000
Weighted average exercise price		$ 28.89
Weighted Average Remaining Contractual Term		1 year
Former Affiliated Entity [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options exercised		$ 24,000	$ 352,000	$ 1,382,000
Weighted average exercise price		$ 28.62
Aggregate intrinsic value		$ 0