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Stockholders' Equity (Long Term Incentive Plan) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 6 Months Ended |  | 0 Months Ended | 6 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 Full Performance Criteria [Member] First Three Years [Member] JD Alexander [Member] | Mar. 31, 2013 Full Performance Criteria [Member] First Three Years [Member] Named Executive Officers [Member] | Mar. 31, 2013 Full Performance Criteria [Member] Fourth Year [Member] JD Alexander [Member] | Mar. 31, 2013 Full Performance Criteria [Member] Fourth Year [Member] Named Executive Officers [Member] | Mar. 31, 2013 Full Performance Criteria [Member] Fifth Year [Member] JD Alexander [Member] | Mar. 31, 2013 Full Performance Criteria [Member] Fifth Year [Member] Named Executive Officers [Member] | Mar. 31, 2013 Performance Shares [Member] | May 26, 2011 Performance Shares [Member] | Apr. 19, 2012 Performance Shares [Member] JD Alexander [Member] | May 26, 2011 Performance Shares [Member] Named Executive Officers [Member] | Mar. 31, 2013 Performance Shares [Member] Full Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Full Performance Criteria [Member] First Three Years [Member] | Mar. 31, 2013 Performance Shares [Member] Full Performance Criteria [Member] Fourth Year [Member] | Mar. 31, 2013 Performance Shares [Member] Full Performance Criteria [Member] Fifth Year [Member] | Mar. 31, 2013 Performance Shares [Member] Partial Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting Immediately [Member] Full Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting Immediately [Member] Partial Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting on First Anniversary of Achievement Date [Member] Full Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting on First Anniversary of Achievement Date [Member] Partial Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting on Second Anniversary of Achievement Date [Member] Full Performance Criteria [Member] | Mar. 31, 2013 Performance Shares [Member] Vesting on Second Anniversary of Achievement Date [Member] Partial Performance Criteria [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan duration |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares approved for issuance |  |  |  |  |  |  |  |  |  |  |  | 152,403 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares granted |  |  |  |  |  |  |  |  |  |  |  |  | 93,793 | 58,610 |  |  |  |  |  |  |  |  |  |  |
Fair value of shares awarded |  |  |  |  |  |  |  |  |  |  | $ 310 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumed annual volatility |  |  |  |  |  |  |  |  |  |  | 53.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumed risk free interest rate |  |  |  |  |  |  |  |  |  |  | 2.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock trading window |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 days |  |  |  | 20 days |  |  |  |  |  |
Base stock price |  |  |  |  | $ 46.00 | $ 50.40 | $ 49.22 | $ 53.93 | $ 52.44 | $ 57.46 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trading value of common stock, percentage of base price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200.00% | 214.00% | 228.00% | 90.00% |  |  |  |  |  |
Percentage of award awarded |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  | 50.00% |  |  |  |  |  |
Vesting rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 25.00% | 25.00% | 12.50% | 25.00% | 12.50%
Stock-based compensation expense | $ 174 | $ 125 | $ 315 | $ 246 |  |  |  |  |  |  | $ 27 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 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 2 -Subparagraph (h)(1)(i) -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 g(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 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -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 6: 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=6793087&loc=d3e301413-122809 + Details
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- Definition The total fair value of shares issued during the period under a deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b -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 estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over 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 (f)(2)(ii) -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 e(2)(b) -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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