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Stock Options and Restricted Stock Awards (Details) (USD $) | 3 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013
Stock Options [Member] |  |
Summary of Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted [Abstract] |  |
Weighted average risk free interest rate (in hundredths) | 1.75% | 1.39%
Weighted average expected holding period (years) | 5 years 0 months 4 days | 7 years 0 months 4 days
Weighted average expected volatility (in hundredths) | 46.02% | 44.21%
Weighted average expected dividend yield (in hundredths) | 0.00% | 0.00%
Weighted average fair value of options granted (in dollars per share) | $ 9.65 | $ 2.96
Number of Shares [Roll Forward] |  |
Outstanding at beginning of period (in shares) | 1,426,968 |
Granted (in shares) | 82,537 | 6,000
Exercised (in shares) | 0 |
Cancelled (in shares) | (7,250) |
Outstanding at end of period (in shares) | 1,502,255 |
Weighted Average Exercise Price [Roll Forward] |  |
Outstanding at beginning of period (in dollars per share) | $ 9.21 |
Granted (in dollars per share) | $ 22.99 |
Exercised (in dollars per share) | $ 0 |
Cancelled (in dollars per share) | $ 10.81 |
Outstanding at end of period (in dollars per share) | $ 9.96 |
Number of stock options exercisable (in shares) | 933,016 |
Weighted average exercise price of stock options exercisable (in dollars per share) | $ 9.04 |
Number of Shares [Roll Forward] |  |
Non-vested at beginning of period (in shares) | 490,702 |
Granted (in shares) | 82,537 | 6,000
Vested (in shares) | (4,000) |
Cancelled (in shares) | 0 |
Non-vested at end of period (in shares) | 569,239 |
Weighted Average Grant Date Fair Value [Roll Forward] |  |
Non-vested at beginning of period (in dollars per share) | $ 4.39 |
Granted (in dollars per share) | $ 9.65 | $ 2.96
Vested (in dollars per share) | $ 3.00 |
Cancelled (in dollars per share) | $ 0 |
Non-vested at end of period (in dollars per share) | $ 5.16 |
Total unrecognized compensation expense | $ 2,301,000 |
Weighted average vesting period over which compensation expense is expected to be recognized | 1 year 10 months 24 days |
Restricted Stock Units (RSUs) [Member] |  |
Weighted Average Grant Date Fair Value [Roll Forward] |  |
Weighted average vesting period over which compensation expense is expected to be recognized | 2 years 6 months |
Summary of restricted stock transactions [Abstract] |  |
Number of equal annual installments in which awards vest | 3 |
Fair value to be recognized as compensation expense | 2,316,000 |
Number of Shares [Roll Forward] |  |
Non-vested RSU's at beginning of period (in shares) | 138,000 |
RSU's granted (in shares) | 95,645 |
RSU's vested (in shares) | (4,400) |
RSU's cancelled (in shares) | 0 |
Non-vested RSU's at end of period (in shares) | 229,245 |
Weighted Average Grant Date Fair Value [Roll Forward] |  |
Non-vested RSU's at beginning of period (in dollars per share) | $ 9.32 |
RSU's granted (in dollars per share) | $ 24.21 |
RSU's vested (in dollars per share) | $ 22.93 |
RSU's cancelled (in dollars per share) | $ 0 |
Non-vested RSU's at end of period (in dollars per share) | $ 15.27 |
Total unrecognized compensation expense | $ 3,171,000 |

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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 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 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 S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -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 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + 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 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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