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Stock Based Compensation (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 0 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 | Sep. 30, 2014 Restricted stock grants | Sep. 30, 2013 Restricted stock grants | Sep. 30, 2014 Restricted stock grants | Sep. 30, 2013 Restricted stock grants | Sep. 30, 2014 Restricted stock units | Sep. 30, 2013 Restricted stock units | Sep. 30, 2014 Restricted stock units | Sep. 30, 2013 Restricted stock units | Sep. 30, 2014 2012 Incentive Plan | Sep. 30, 2014 2012 Incentive Plan Restricted stock grants | Sep. 30, 2014 Prior Incentive Plans | Sep. 30, 2014 Pay-for-performance program | Sep. 14, 2010 Pay-for-performance program Restricted stock units | Sep. 30, 2014 Pay-for-performance program Restricted stock units
Stock Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance |  |  |  |  |  |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |
Vesting period |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Number of shares to be vested and issued for each unit outstanding on satisfying performance criteria at June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Number of shares to be issued for each unit outstanding on not satisfying performance criteria at June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0
Outstanding options at the end of the period (in shares) | 0 | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of the activity of the incentive plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted share grants |  |  |  |  |  |  |  | 118,850 | 112,650 |  |  |  |  |  |  |  |  | 200,000 |
Per share grant price (in dollars per share) |  |  |  |  |  |  |  | $ 20.54 | $ 21.59 |  |  |  |  |  |  |  |  |  |
Deferred compensation to be recognized over vesting period |  |  |  |  |  |  |  | $ 2,441,000 | $ 2,432,000 |  |  |  |  |  |  |  |  |  |
Non-vested shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested beginning of period (in shares) |  |  |  |  |  | 481,045 | 470,015 | 470,015 | 407,460 |  |  |  |  |  | 229,000 | 452,000 |  |  |
Grants (in shares) |  |  |  |  |  |  |  | 118,850 | 112,650 |  |  |  |  |  |  |  |  | 200,000 |
Vested during period (in shares) |  |  |  |  |  |  |  | (101,300) | (50,095) |  |  |  |  |  |  |  |  |  | 0
Forfeitures (in shares) |  |  |  |  |  | (50) |  | (6,570) |  |  |  |  |  |  |  |  |  |  | 0
Non-vested end of period (in shares) |  |  |  |  |  | 480,995 | 470,015 | 480,995 | 470,015 |  |  |  |  |  | 229,000 | 452,000 |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average per share value of non-vested shares (based on grant price) (in dollars per share) |  |  |  |  |  | $ 14.55 | $ 14.22 | $ 14.55 | $ 14.22 |  |  |  |  |  |  |  |  |  |
Value of shares vested during the period (based on grant price) |  |  |  |  |  |  |  | 621,000 | 876,000 |  |  |  |  |  |  |  |  |  |
The total charge to operations for all incentive plans, including the 200,000 Units, is as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation charged to operations | 448,000 | 366,000 | 1,368,000 | 1,132,000 |  | 419,000 | 335,000 | 1,281,000 | 1,037,000 | 29,000 | 31,000 | 87,000 | 95,000 |  |  |  |  |  |
Compensation costs related to non-vested awards that have not yet been recognized | $ 5,293,000 |  | $ 5,293,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 315,000 |  |
Approximate weighted average vesting period |  |  | 2 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 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 + Details
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- Definition 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. + 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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