Equity Incentive Plans and Stock-Based Compensation (Details) - shares		9 Months Ended
		Sep. 30, 2020
Stock compensation plan
Shares available for grant
Shares available, at the beginning of the year		6,826,863
Increase in shares approved for issuance	[1]	7,800,000
Stock options granted (in shares)		(40,000)
Stock options forfeited (in shares)		97,836
Nonvested equity stock and stock units granted (in shares)	[2],[3]	(3,446,570)
Nonvested equity stock and stock units forfeited (in shares)	[3]	977,873
Shares available, at the end of the period		12,216,002
Conversion factor used to calculate the decrease in the number of shares available for grant resulting from the grant of restricted stock awards		1.5
Conversion factor used to calculate the increase in the number of shares available for grant resulting from the forfeiture of restricted stock awards		1.5
Potential additional performance stock units
Shares available for grant
Nonvested equity stock and stock units granted (in shares)	[2]	500,000

[1] On April 30, 2020, the Company’s stockholders approved an additional 7,800,000 shares for issuance under the 2015 Plan.

[2] Amount includes approximately 0.5 million shares that have been reserved for potential future issuance related to certain performance unit awards granted in the first quarter of 2020 and discussed under the section titled “Nonvested Equity Stock and Stock Units” below.

[3] For purposes of determining the number of shares available for grant under the 2015 Equity Incentive Plan (the “2015 Plan”) against the maximum number of shares authorized, each share of restricted stock granted reduces the number of shares available for grant by 1.5 shares and each share of restricted stock forfeited increases shares available for grant by 1.5 shares.