Stock-Based Compensation- Employee Stock Purchase Plan (Details) (USD $)	9 Months Ended	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Employee Stock Purchase Plan [Member]	Jun. 30, 2014 Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan ESPP Disclosures [Line Items]
Options To Purchase Common Stock Shares	0	59,000	92,000
Weighted average fair value of each option	$ 0	$ 10.28	$ 5.96
Expected volatility		30.00%	34.00%
Risk-free weighted average interest rate		0.06%	0.09%
Vesting Period		0 years 6 months 0 days	0 years 6 months 0 days