Stockholders' Equity (Details Textual) - USD ($)			3 Months Ended	6 Months Ended		51 Months Ended
	Jun. 30, 2015	Nov. 14, 2013	Mar. 31, 2014	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Mar. 31, 2018	Sep. 30, 2015	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				0
Exercises in period, intrinsic value				$ 4,177,000
Compensation cost not yet recognized				$ 0
Restricted Stock Units and Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive securities excluded from computation of Earnings Per Share, amount (in shares)				3,300,383	3,312,492
Convertible Debt
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive securities excluded from computation of Earnings Per Share, amount (in shares)					2,700,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				2 years 10 months 24 days
Compensation cost not yet recognized				$ 169,414,000
The 2005 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)									4,713,319
Vesting period (in years)			4 years
Granted (in shares)							0
Shares available for grant (in shares)				0
The 2013 Omnibus Equity Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)		1,904,633
Percentage of outstanding stock reserved for grant		4.00%
Percentage of outstanding stock maximum		5.00%
Capital shares reserved for future issuance, annual increase, maximum (in shares)				5,530,555
The 2013 Omnibus Equity Award Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		4 years
2015 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum employee subscription rate								15.00%
Purchase price of common stock, percent	85.00%
Number of shares authorized (in shares)								500,000
Percent of shares increase, employee stock purchase plan	1.00%
Common stock availability threshold, Employee Stock Purchase Plan	2.00%
Shares increase threshold, employee stock purchase plan (in shares)	400,000
Number of additional shares authorized (in shares)						702,163
Convertible Debt | 2025 Senior Notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial conversion price (in dollars per share)				$ 92.12