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Share-Based Compensation Plans (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended | 128 Months Ended | 1 Months Ended | 8 Months Ended | 12 Months Ended | 1 Months Ended | 8 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2013 Time Based Awards [Member] | Dec. 31, 2012 Time Based Awards [Member] | Dec. 31, 2011 Time Based Awards [Member] | Dec. 31, 2013 Performance Based Awards [Member] | Dec. 31, 2013 Restricted Stock [Member] | Dec. 31, 2012 Restricted Stock [Member] | Dec. 31, 2011 Restricted Stock [Member] | May 31, 2002 Plan 2002 [Member] | Dec. 31, 2013 Plan 2002 [Member] | Dec. 31, 2012 Plan 2002 [Member] | Apr. 30, 2006 Plan 2006 [Member] | Dec. 31, 2013 Plan 2006 [Member] | Dec. 31, 2013 Plan 2006 [Member] | Dec. 31, 2009 Plan 2006 [Member] | Dec. 31, 2013 Plan 2006 [Member] Time Based Awards [Member] | Dec. 31, 2012 Plan 2006 [Member] Time Based Awards [Member] | Dec. 31, 2011 Plan 2006 [Member] Time Based Awards [Member] | Dec. 31, 2010 Plan 2006 [Member] Time Based Awards [Member] | Dec. 31, 2008 Plan 2006 [Member] Time Based Awards [Member] | Dec. 31, 2013 Plan 2006 [Member] Performance Based Awards [Member] | Dec. 31, 2012 Plan 2006 [Member] Performance Based Awards [Member] | Dec. 31, 2011 Plan 2006 [Member] Performance Based Awards [Member] | Dec. 31, 2010 Plan 2006 [Member] Performance Based Awards [Member] | Dec. 31, 2008 Plan 2006 [Member] Performance Based Awards [Member] | Apr. 30, 2005 Director Share Plan [Member] | Dec. 31, 2013 Director Share Plan [Member] | Dec. 31, 2013 Director Share Plan [Member] | Dec. 31, 2012 Director Share Plan [Member] | Dec. 31, 2011 Director Share Plan [Member] | Dec. 31, 2010 Director Share Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation award reserved for issuance of common shares |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  | 3,000,000 | 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 | 700,000 |  |  |  |
Share-based compensation award granted in period |  |  |  |  |  |  |  |  |  |  |  |  |  | 86,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation award, number of shares available for grant | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation award vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  | 3 years |  | 3 years | 3 years | 3 years | 3 years |  | 3 years | 3 years | 3 years | 3 years |  |  | 1 year | 1 year | 1 year | 1 year
Share-based compensation restricted common shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,319,200 |  | 2,145,300 |  |  |  |  | 1,173,900 |  |  |  |  | 435,534 |  |  |  |  |
Share-based compensation expiration date |  |  |  |  |  |  |  |  |  |  |  |  | May 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options grant date contractual life |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation, maximum number of shares issuable |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation options exercised in period intrinsic value |  |  | $ 117 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation options exercisable intrinsic value | 0 | 0 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share options, exercised |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant date fair value, granted |  |  |  |  | $ 6.13 |  |  | $ 7.52 | $ 6.13 | $ 9.95 | $ 15.79 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation grant value |  |  |  |  | 3,330 |  |  | 1,873 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation vested in period, fair value |  |  |  |  | 2,177 | 4,413 | 3,743 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation cash received | 0 | 0 | 168 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee service share-based compensation, nonvested, period for recognition |  |  |  |  | 1 year 11 months 5 days |  |  | 1 year 3 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax benefit realized from stock based compensation | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The value represents the total of unrecognized compensation cost related to nonvested time based restricted common share awards granted. + References No definition available. + Details
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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. + References No definition available. + 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 Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual 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 (j) -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 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). + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Date the equity-based award expires, in CCYY-MM-DD format. + 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)(2) -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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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + 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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- Definition 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. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during 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 (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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