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Stock Based Compensation Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expense for stock-based compensation | $ 10,112 | $ 10,091 | $ 8,615
Restricted Stock Plan Expense | $ 9,251 | 9,335 | 7,962
Share-based Compensation Arrangement by Share-based Payment Award, Termination Period After Termination of Employment | 30 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Termination Period After Retirement | 3 months |  |
Share-based Compensation Arrangement by Share-based Payment Award, Termination Period After Death | 1 year |  |
Share-based Compensation Arrangement by Share-based Payment Award, Termination After Grant Date | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date | Oct. 29, 2006 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 6 months |  |
Deferred Compensation Arrangement with Individual, Requisite Service Period | 4 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vesting After One Year | 25.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vesting After Two Years | 50.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vesting After Three Years | 75.00% |  |
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance | 700 |  |
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance for each Director | 100 |  |
1996 SOP [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Adopted Date | Oct. 29, 1996 |  |
2005 NSOP [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Adopted Date | Sep. 23, 2005 |  |
Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation expense yet to be recognized | $ 0 |  |
Weighted average remaining contractual term | 3 years 62 days |  |
Income tax benefits from stock option exercises | $ 4,343 | 3,420 | 3,632
Total intrinsic value of options exercised | $ 1,044 | $ 704 | $ 8,254
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Adopted Date | Aug. 20, 2010 |  |
Compensation expense yet to be recognized | $ 9,442 |  |
Compensation expense yet to be recognized, period for recognition | 1 year 58 days |  |
Granted, number of shares | 178,000 | 164,000 | 174,000
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Adopted Date | Nov. 01, 2005 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Termination After Grant Date | 7 years |  |
Deferred Compensation Arrangement with Individual, Requisite Service Period | 3 years |  |
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance | 3,000 |  |
Compensation expense yet to be recognized | $ 808 |  |
Compensation expense yet to be recognized, period for recognition | 1 year 7 days |  |
Granted, number of shares | 12,000 | 30,000 | 53,000
Fair value under Monte Carlo [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, number of shares | 164,000 |  |
Fair value on grant date less PV of dividends [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, number of shares | 14,000 |  |

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- Definition Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, 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 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 2: 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 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 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 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 Date the equity-based award expires, in CCYY-MM-DD format. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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