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Share-Based Payments - Summary of Grants of RSUs (Details) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended
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Apr. 30, 2013 Shares Vesting [Member] | Feb. 28, 2013 Shares Vesting [Member] | Jun. 30, 2013 Shares Vesting [Member] | May 31, 2013 RSU Vesting [Member] | Feb. 28, 2013 RSU Vesting [Member] | Jun. 30, 2013 RSU Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Date | April 2013 | February 2013 |  | May 2013 | February 2013 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 11,304 | 20,000 | 31,304 | 15,000 | 180,000 | 195,000
Estimated Fair Value on Grant Date | $ 200 | $ 352 |  | $ 261 | $ 3,166 |
Initial Vesting | Jul. 01, 2013 | Dec. 01, 2013 |  | Dec. 01, 2013 | Dec. 01, 2013 |
Final Vesting | Apr. 01, 2016 | Dec. 01, 2015 |  | Dec. 01, 2015 | Dec. 01, 2015 |

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- Definition Share based compensation arrangement final vesting date. + References No definition available. + Details
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- Definition Share based compensation arrangement initial vesting date. + References No definition available. + Details
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- Definition 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). + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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