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Share-Based Payments (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2015
Director Fee Plan [Member] |  |  |
Stock option activity [Roll Forward] |  |  |
Outstanding, end of period (in shares) | 0 |  |
Director Fee Plan, aggregate disclosures [Abstract] |  |  |
Shares deferred under the Director Fee Plan (in shares) |  |  | 17,005
Value of annual stock based grant | $ 110 |  |
Total stock options granted to date (in shares) |  |  | 22,300
Option awards outstanding (in shares) | 0 |  | 0
Total restricted stock awards granted to date (in shares) |  |  | 136,568
Restricted stock awards unvested (in shares) |  |  | 33,418
All Plans [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Total stock-based compensation cost | $ 2,526 | $ 2,525 |
Future income tax benefit from compensation expense recognized | 985 | 985 |
Cash received from stock options exercised | 1,718 | 3,727 |
Tax benefit realized from options exercised | $ 283 | 315 |
All Plans [Member] | Stock Options [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Expiration period | 10 years |  |
Restricted stock activity [Roll Forward] |  |  |
Expired or forfeited (in shares) | (89,240) |  |
Stock option activity [Roll Forward] |  |  |
Outstanding, beginning of period (in shares) | 337,938 |  |
Exercised (in shares) | (47,834) |  |
Expired or forfeited (in shares) | (98,745) |  |
Outstanding, end of period (in shares) | 191,359 |  |
Exercisable (in shares) | 114,193 |  |
Outstanding, weighted-average exercise price, beginning of period (in dollars per share) | $ 39.19 |  |
Exercised, weighted-average exercise price (in dollars per share) | 37.59 |  |
Expired or forfeited, weighted-average exercise price (in dollars per share) | 37.33 |  |
Outstanding, weighted-average exercise price, end of period (in dollars per share) | $ 40.56 |  |
Exercisable, weighted-average exercise price (in dollars per share) |  |  | $ 40.56
Outstanding, weighted-average remaining contractual term | 10 months 24 days |  |
Outstanding, aggregate intrinsic value |  |  | $ 2,468
Exercisable, weighted-average remaining contractual term | 10 months 24 days |  |
Exercisable, aggregate intrinsic value |  |  | $ 1,473
Intrinsic value of options exercised | $ 898 | $ 841 |
Non-vested options activity [Roll Forward] |  |  |
Non-vested at beginning of period (in shares) | 166,406 |  |
Expired or forfeited (in shares) | (89,240) |  |
Non-vested at end of period (in shares) | 77,166 |  |
Non-vested, weighted-average grant-date fair value, beginning of period (in dollars per share) | $ 12.43 |  |
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | 12.56 |  |
Non-vested, weighted-average grant-date fair value, end of period (in dollars per share) | $ 12.29 |  |
Director Fee Plan, aggregate disclosures [Abstract] |  |  |
Option awards outstanding (in shares) | 337,938 |  | 191,359
All Plans [Member] | Stock Options [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Stock Options [Member] | After 4 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Vesting period | 4 years |  |
All Plans [Member] | Stock Options [Member] | After 5 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 33.00% |  |
Vesting period | 5 years |  |
All Plans [Member] | Restricted Stock [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Expiration period | 5 years |  |
Restricted stock activity [Roll Forward] |  |  |
Non-vested at beginning of period (in shares) | 570,567 |  |
Granted (in shares) | 213,370 |  |
Vested (in shares) | (249,340) |  |
Expired or forfeited (in shares) | (2,785) |  |
Non-vested at end of period (in shares) | 531,812 |  |
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ 33.66 |  |
Granted, weighted-average grant-date fair value (in dollars per share) | 52.08 |  |
Vested, weighted-average grant-date fair value (in dollars per share) | 29.94 |  |
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | 36.89 |  |
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ 44.93 |  |
Non-vested options activity [Roll Forward] |  |  |
Expired or forfeited (in shares) | (2,785) |  |
Unrecognized compensation cost [Abstract] |  |  |
Unrecognized compensation cost on non-vested awards |  |  | $ 15,636
Weighted average period of recognition of unrecognized compensation cost on non-vested awards | 2 years |  |
Fair value assumptions [Abstract] |  |  |
Expected volatility | 20.70% | 22.20% |
Dividend yield | 1.00% | 1.00% |
Average risk-free interest rate | 1.70% | 1.70% |
Average expected term | 2 years 1 month 6 days | 1 year 9 months 18 days |
All Plans [Member] | Restricted Stock [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 50.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Restricted Stock [Member] | Attainment of Pre-Defined Levels of Appreciation in Market Value [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 16.66% |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | After 3 Years [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 50.00% |  |
Vesting period | 3 years |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | Attainment of Pre-Defined Levels of Appreciation in Market Value [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 8.33% |  |
All Plans [Member] | Restricted Stock [Member] | Fiscal 2013 and Thereafter [Member] | Attainment of Pre-Defined Levels of Adjusted Earnings Per Share [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Vesting percentage | 8.33% |  |
2012 Equity Incentive Plan [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Term of plan | 10 years |  |
Maximum number of shares available for grants or awards (in shares) |  |  | 2,500,000
Shares reserved for future issuance under award plan (in shares) |  |  | 1,050,058
2014 Director Fee Plan [Member] |  |  |
Share-based compensation, aggregate disclosures [Abstract] |  |  |
Shares reserved for future issuance under award plan (in shares) |  |  | 150,000
Director Fee Plan, aggregate disclosures [Abstract] |  |  |
Annual retainer fee paid to non-employee directors | $ 75 |  |
Annual retainer fee paid to non-employee Chairman of the Board | $ 175 |  |

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- Definition The term of the identified stock based compensation plan 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 Total stock options awards granted to date under the stock based compensation plan. + References No definition available. + Details
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- Definition Total restricted stock awards granted to date under the stock based compensation plan. + References No definition available. + Details
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- Definition The total number of unvested restricted stock awards under the stock based compensation plan, as of the reporting date. + 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 S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: 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 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 Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements. + 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 (j) -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 total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(3) -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 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 + 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 A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + 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 The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 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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