Stock Options, Restricted Stock Units and Employee Stock Purchase Plan - Additional Information (Details)	3 Months Ended		11 Months Ended
	Mar. 31, 2018 USD ($) offering_period shares	Mar. 31, 2017 USD ($) shares	Mar. 31, 2018 shares	Dec. 31, 2017 shares	May 02, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in Shares)	4,013,000		4,013,000	4,053,000
Number of options granted (in Shares)	0		0
Exercise of stock options (in Shares)	22,000	100,000
Proceeds from stock options exercised | $	$ 500,000	$ 1,100,000
Tax benefit from compensation expense | $	$ 200,000	$ 800,000
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unit granted (in Shares)	6,000
Annual award vesting percentage	25.00%
Award vesting period	4 years
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in Shares)	7,400,000		7,400,000
Number of options granted (in Shares)	0
Omnibus Plan | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, outstanding (in Shares)	600,000.0		600,000.0
Number of unit granted (in Shares)	700,000.0
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in Shares)					7,500,000.0
Options outstanding (in Shares)	3,800,000		3,800,000
2014 Plan | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, outstanding (in Shares)	200,000		200,000
Two Thousand And Three Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in Shares)	200,000.0		200,000.0
Employee Stock Purchase Plan ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contributions from plan participants through payroll deductions | $	$ 8,000,000
Number of shares reserved for issuance (in Shares)	2,000,000.0		2,000,000.0
Discount from market price at the beginning or end of the offering period	15.00%
Number of offering periods | offering_period	2
Maximum annual purchase per employee under ESPP | $	$ 25,000
Maximum annual withholdings per employee for purchases under ESPP | $	$ 21,250
Maximum number of shares available for purchase per employee (in Shares)	15,000
Employee stock purchase plan	146,247
Employee Stock Purchase Plan ESPP | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of base wages withheld for purchase of stock	1.00%
Employee Stock Purchase Plan ESPP | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of base wages withheld for purchase of stock	15.00%