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Share Based and Deferred Compensation (Details Textuals) (Details) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended |  | 3 Months Ended | 0 Months Ended | 12 Months Ended |
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Mar. 31, 2014 | Dec. 31, 2011 Stock Option [Member] | Mar. 31, 2014 Restricted Stock [Member] | Mar. 31, 2013 Restricted Stock [Member] | Dec. 31, 2013 Restricted Stock [Member] | Mar. 31, 2014 Restricted Stock [Member] Minimum [Member] | Mar. 31, 2014 Restricted Stock [Member] Maximum [Member] | Mar. 31, 2014 Restricted Performance Share Units Plan [Member] | Mar. 31, 2013 Restricted Performance Share Units Plan [Member] | Mar. 31, 2014 Executive Officer [Member] Restricted Stock [Member] | Mar. 11, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member] | Mar. 12, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member] | Mar. 01, 2012 Executive Officer [Member] Restricted Performance Share Units Plan [Member] | Feb. 25, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member] | Feb. 25, 2013 Executive Officer [Member] Restricted Performance Share Units Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voluntary Termination Of Employment Terms |  |  | after reaching age 57 and accumulating at least 15 years of service with the Company |  |  |  |  | after reaching age 57 and accumulating at least 15 years of service with the Company |  |  |  |  |  |  |
Accumulated Service Period For Voluntary Termination |  |  | 15 years |  |  |  |  | 15 years |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Term, Minimum | 3 years |  | 3 years |  |  | 3 years | 7 years | 3 years |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  | three years from the initial grant date |  |  |  |  |  |  |  |  |  |  |  |
Maximum Percentage Of Participants Base Units |  |  |  |  |  |  |  | 200.00% |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value |  |  |  |  |  |  |  |  |  |  | $ 2,624,000 | $ 1,225,000 | $ 4,273,000 | $ 4,137,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number |  |  | 687,904 |  | 563,713 |  |  |  |  |  | 134,284.00 | 61,720.00 | 211,521.00 |  | 203,395.00
Vested/Exerciseable, shares | 2,983,569 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition |  |  | 1 year 8 months 12 days |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized |  |  | 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  | 300,000 | 1,400,000 | 900,000 |  |  |  | 1,700,000 | 1,200,000 |  |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount |  |  | $ 200,000 | $ 200,000 |  |  |  | $ 400,000 | $ 300,000 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |  |  | 70,548 |  |  |  |  |  | 150,829 |  |  |  |  |  |
Age Limit Of Voluntary Termination Of Employment |  |  |  |  |  |  |  |  |  | 57 |  |  |  |  |

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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 Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, 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 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 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 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 The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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