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Stock-Based Compensation Plans and Employee Benefits (Stock-based Compensation) (Details) $ / shares in Units, $ in Thousands		1 Months Ended					12 Months Ended
	Jan. 30, 2015 shares	Feb. 28, 2015 shares	Jan. 31, 2015 $ / shares shares	May. 31, 2014 shares	May. 31, 2013	Feb. 28, 2013	Dec. 31, 2015 USD ($) Installment $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued expenses | $							$ 68,937	$ 62,866
Stock-based compensation expense | $							12,013	13,314	$ 19,261
Unrecognized compensation cost | $							$ 1,900
Weighted-average period to recognize the unrecognized compensation cost							10 months 10 days
Long-term Incentive Plan 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized							8,000,000
Long-term Incentive Plan 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized							4,550,000
Number of shares reserved for grants of options							1,000,000
Long-term Incentive Plan 2006 and 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance							3,700,000
2013-2014 Performance Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of points issued (in shares)		10		73
Preferred return				9.00%
2014-2015 Performance Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of points issued (in shares)		34
All Performance Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued expenses | $							$ 16,600	7,800
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, aggregate intrinsic value | $							$ 4,991	$ 4,367
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at Beginning of Period, Number of Shares			320,000				320,000
Granted, Number of Shares							119,000
Vested, Number of Shares							(7,000)
Forfeited, Number of Shares							(6,000)
Non-vested at End of Period, Number of Shares							426,000	320,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested at Beginning of Period, Weighted Average Grant Date Fair Value Per Share, (in dollars per share) | $ / shares			$ 12.57				$ 12.57
Granted, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares							13.65
Vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares							8.53
Forfeited, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares							14.66
Non-vested at End of Period, Weighted Average Grant Date Fair Value Per Share, (in dollars per share) | $ / shares							$ 12.90	$ 12.57
Fair value of units vested during period | $							$ 100	$ 39,200	$ 31,600
Performance based restricted stock units vesting on December 31, 2017 | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							48,519
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted units	49,650
Risk-free interest rate			0.75%
Expected stock price volatility			28.14%
Performance based restricted stock units vesting on December 31, 2017 | Employees | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Vesting percentage	0.00%
Performance based restricted stock units vesting on December 31, 2017 | Employees | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Vesting percentage	200.00%
Service based restricted stock units vesting on December 31, 2017 | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							61,557
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted units	64,196
Number of cliff installments | Installment							1
Service based restricted stock units with specified vesting dates | Employees 2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							4,751
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Number of cliff installments | Installment							1
Performance-based restricted stock units vesting on December 31, 2016 | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted units	49,434
Risk-free interest rate			0.76%
Expected stock price volatility			44.84%
Service-based restricted stock units | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							62,662
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Number of cliff installments | Installment							1
Service-based restricted stock units vesting on February 1, 2016 | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							194,526
Service based restricted stock units vesting on May 14, 2016 | Employees
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Non-vested at End of Period, Number of Shares							4,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Vesting period					3 years	3 years
Common stock subject to sales restriction | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, aggregate intrinsic value | $							$ 4,200
Restricted shares awarded							189,241
Sale restriction period							2 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested at End of Period, Weighted Average Grant Date Fair Value Per Share, (in dollars per share) | $ / shares							$ 13.04
Shares issued							318,482

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include property accounts payable, legal liabilities, loan costs, general and administrative liabilities, but exclude interest.

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The number of shares that has been reserved for grants of options designated as incentive stock options under the plan.

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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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Unrecognized cost of unvested share-based compensation awards.

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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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The number of restricted shares issued as compensation, net of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes.

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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 equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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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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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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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of share instruments newly issued under a share-based compensation plan.

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

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