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Stock Based Compensation (Details 2) (USD $) | 3 Months Ended
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Jun. 30, 2012
Summary of changes in unvested options |
Weighted average exercise price, Beginning Balance | $ 20.12
Weighted average exercise price, Granted |
Weighted average exercise price, Ending Balance | $ 20.26
Unvested Stock Options [Member] |
Summary of changes in unvested options |
Number of options, Beginning Balance | 133,904
Number of options, Granted |
Number of options, Vested | (18,079)
Number of options, Cancelled | (11,832)
Number of options, Ending Balance | 103,993
Weighted average exercise price, Beginning Balance | $ 11.66
Weighted average exercise price, Granted |
Weighted Average Exercise Price, Vested | $ 12.13
Weighted Average Exercise Price, Cancelled | $ 11.96
Weighted average exercise price, Ending Balance | $ 11.54
Weighted Average Grant Date Fair Value, Beginning Balance | $ 9.34
Weighted Average Grant Date Fair Value, Granted |
Weighted Average Grant Date Fair Value, Vested | $ 9.79
Weighted Average Grant Date Fair Value, Cancelled | $ 9.12
Weighted Average Grant Date Fair Value, Ending Balance | $ 9.28

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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