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Stock-Based Compensation Plans and Employee Benefits (Stock-based Compensation) (Details) (USD $) | 3 Months Ended |  | 3 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended |  |  | 1 Months Ended |  | 1 Months Ended |  | 3 Months Ended |
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Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 Long-term Incentive Plan 2006 and 2009 | Mar. 31, 2014 Employees Restricted stock units | Mar. 31, 2014 Employees Amended restricted stock units vesting on January 1, 2014 | Mar. 31, 2014 Employees Service-based restricted stock units vesting on March 2014 | Jan. 10, 2014 Employees Common Stock Subject to Sales Restriction [Member] | Jan. 31, 2014 Employees Common shares | Jan. 31, 2014 Employees Service-based restricted stock units | Jan. 10, 2014 Employees Service-based restricted stock units | Dec. 31, 2013 Employees Service-based restricted stock units | Jan. 31, 2014 Employees Performance-based restricted stock units vesting on December 31, 2016 | Mar. 31, 2014 Employees Performance-based restricted stock units vesting on December 31, 2016 | Jan. 10, 2014 Employees Performance-based restricted stock units vesting on December 31, 2016 | Jan. 31, 2014 Employees Performance-based restricted stock units vesting on December 31, 2016 Minimum | Jan. 31, 2014 Employees Performance-based restricted stock units vesting on December 31, 2016 Maximum | Feb. 28, 2013 Employees Service-based restricted stock units vesting on February 1, 2016 | Mar. 31, 2014 Employees Service-based restricted stock units vesting on February 1, 2016 | Mar. 31, 2014 Employees Performance based restricted stock units vesting on December 31, 2014 | Feb. 28, 2013 Employees Performance-based restricted stock units | Feb. 28, 2013 Employees Performance-based restricted stock units Minimum | Feb. 28, 2013 Employees Performance-based restricted stock units Maximum | Mar. 31, 2014 Employees Service based restricted stock units with specified vesting dates | Mar. 31, 2014 Employees Service based restricted stock units with specified vesting dates Minimum | Mar. 31, 2014 Company's chairman and chief executive officer Service-based restricted stock units vesting on June 15, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense | $ 2,075,000 | $ 5,202,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average period to recognize the unrecognized compensation cost | 0 years 10 months 10 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation share-based arrangements, liability, current and noncurrent | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares available for issuance |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in shares) |  |  |  | 1,736,053 | 1,696,053 | 40,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted shares awarded |  |  |  | 898,598 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested, outstanding (in shares) |  |  |  |  |  |  | 229,235 |  |  |  | 66,564 |  | 51,458 |  |  |  |  | 195,382 | 195,209 |  |  |  | 50,666 |  | 600,000
Vesting term |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  | 3 years |
Sale restriction period |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted, Number |  |  |  |  |  |  |  |  |  | 67,637 |  |  |  | 51,726 |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 200.00% |  |  |  |  | 0.00% | 200.00% |  |  |
Risk-free interest rate |  |  |  |  |  |  |  |  |  |  |  | 0.76% |  |  |  |  |  |  |  | 0.26% |  |  |  |  |
Expected stock price volatility |  |  |  |  |  |  |  |  |  |  |  | 44.84% |  |  |  |  |  |  |  | 50.44% |  |  |  |  |

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Sale Restriction Period + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Percentage + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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