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Equity and Long-Term Incentive Compensation Plans - Employee Stock Purchase Plan (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |
ESPP maximum employee subscription rate | 10.00% |
Employee stock purchase plan offering period | 6 months |
Share-based compensation arrangement, discount from market price, lesser of commencement of offering period or purchase date (percent) | 85.00% |
Share-based Compensation Arrangement, Fair Value Assumptions and Methodology |  |
Expected stock price volatility (as a percent) | 20.60% | 23.90%
Risk-free interest rate (as a percent) | 0.40% | 0.10%
Dividend yield (as a percent) | 2.90% | 3.70%
Expected life (in years) | 6 months | 6 months
Employee Stock Purchase Plan Additional Information |  |
Tax benefits realized by the Company in connection with the disqualifying dispositions of shares purchased under the ESPP | $ 704 | $ 380
Weighted-average fair value per share based on Black-Scholes model (in dollars per share) | $ 14.06 | $ 11.34
ESPP maximum annual share replenishment (in shares) | 2,000,000 |
Number of ESPP shares available for future issuance (in shares) | 1,400,000 |

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- Definition Employee Stock Purchase Plan Additional Information [Abstract] + References No definition available. + Details
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- Definition Employee Stock Purchase Plan Offering Period + References No definition available. + Details
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- Definition Espp Maximum Annual Share Replenishment + References No definition available. + Details
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- Definition Number Of Espp Shares Available For Future Issuance + References No definition available. + Details
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- Definition Tax Benefits Realized From Espp + References No definition available. + Details
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- Definition Weighted Average Fair Value Per Share + References No definition available. + Details
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- Definition Discount rate from fair value on offering date that participants pay for 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 -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 highest percentage of annual salary that an employee is permitted to utilize with respect to the 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, 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 (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 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.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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