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Stock Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended | 3 Months Ended |  | 1 Months Ended | 3 Months Ended
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Dec. 31, 2013 Restricted Stock Units (RSUs) | Mar. 31, 2014 Restricted Stock Units (RSUs) | Mar. 31, 2013 Restricted Stock Units (RSUs) | Sep. 30, 2013 Restricted Stock Units (RSUs) | Dec. 31, 2013 Restricted Stock Units (RSUs) Performance Based Restricted Stock Unit | Dec. 31, 2013 Restricted Stock Units (RSUs) Time Based Restricted Stock Unit | Mar. 31, 2014 Restricted Stock | Mar. 31, 2013 Restricted Stock | Dec. 31, 2013 Minimum Restricted Stock Units (RSUs) Performance Based Restricted Stock Unit | Dec. 31, 2013 Maximum Restricted Stock Units (RSUs) Performance Based Restricted Stock Unit | Feb. 26, 2014 2014 Equity Incentive Plan | Feb. 26, 2014 2014 Director Plan | Feb. 28, 2014 Non Employee Director Equity Incentive Plan Restricted Stock | Mar. 31, 2014 Non Employee Director Equity Incentive Plan Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance |  |  |  |  |  |  |  |  |  |  | 750,000 | 150,000 |  |
Vesting period | 3 years |  |  |  |  | 3 years |  |  |  |  |  |  |  | 2 years
Actual amount of RSUs earned based on cumulative earnings |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |
Performance cycle |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Target RSUs granted range |  |  |  |  |  |  |  |  | 0.00% | 150.00% |  |  |  |
Unvested restricted stock outstanding |  | 132,282 |  | 81,555 |  |  |  |  |  |  |  |  |  |
Compensation expense |  | $ 1.5 | $ 1.1 |  |  |  | $ 0.5 | $ 1.1 |  |  |  |  |  |
Shares issued under the plan |  |  |  |  |  |  |  |  |  |  |  |  | 16,000 |
Shares issued, price per share |  |  |  |  |  |  |  |  |  |  |  |  | $ 66.15 |
Vesting percentage per year |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00%

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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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