Share-Based Employee Compensation - Additional Information (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of employee share-based compensation included in income, before income tax	$ 1,888,000	$ 1,210,000	$ 4,257,000	$ 5,086,000
Accrued employee compensation and benefits	26,759,000		26,759,000		20,649,000
Long-term incentive compensation and other	5,451,000		5,451,000		7,131,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, shares granted	0	0	1,843,000
Stock options granted during period, weighted average grant-date fair value			$ 2.47
Compensation expense related to stock options	486,000	253,000	1,333,000	1,310,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	0	10,000	441,000	393,000
Stock units, weighted average grant-date fair value		$ 5.75	$ 6.55	$ 6.36
Compensation expense related to restricted stocks	436,000	332,000	1,258,000	1,172,000
Total unrecognized compensation expense related to non-vested shares granted	3,901,000		3,901,000
Phantom Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted			0	401,000
Stock units, weighted average grant-date fair value				$ 6.37
Vesting period			3 years
Cost of employee share-based compensation included in income, before income tax	430,000	361,000	947,000	1,355,000
Accrued compensation expense	2,247,000		2,247,000
Accrued employee compensation and benefits	1,198,000		1,198,000		0
Long-term incentive compensation and other	1,049,000		1,049,000		1,324,000
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted	0	0	0	3,377,000
Stock units, weighted average grant-date fair value				$ 2.07
Vesting period			3 years
Cost of employee share-based compensation included in income, before income tax	536,000	264,000	719,000	1,250,000
Accrued compensation expense	3,252,000		3,252,000		2,607,000
Accrued employee compensation and benefits	2,705,000		2,705,000		1,819,000
Long-term incentive compensation and other	$ 547,000		$ 547,000		$ 788,000

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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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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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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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).

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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