Stock Compensation - RSU and PSU Rollforward (Details) - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
RSUs
Shares
Beginning balance, shares	673,868	562,368	385,220
Granted, shares	952,801	766,927	365,972
Vested, shares	(232,666)	(124,560)	(175,110)
Forfeited, shares	(154,498)	(530,867)	(13,714)
Ending balance, shares	1,239,505	673,868	562,368
Weighted Average Grant-Date Fair Value Per Share
Beginning balance, weighted average grant date fair value, usd per share	$ 28.07	$ 27.51	$ 22.00
Granted, weighted average grant date fair value, usd per share	20.07	29.14	28.89
Vested, weighted average grant date fair value, usd per share	30.08	25.21	18.40
Forfeited, weighted average grant date fair value, usd per share	23.38	29.69	26.02
Ending balance, weighted average grant date fair value, usd per share	$ 22.13	$ 28.07	$ 27.51
PSU's
Shares
Beginning balance, shares	174,670	0
Granted, shares	401,935	193,763
Forfeited, shares	(65,832)	(19,093)
Ending balance, shares	510,773	174,670	0
Weighted Average Grant-Date Fair Value Per Share
Beginning balance, weighted average grant date fair value, usd per share	$ 31.41	$ 0
Granted, weighted average grant date fair value, usd per share	22.21	31.60
Forfeited, weighted average grant date fair value, usd per share	25.24	33.31
Ending balance, weighted average grant date fair value, usd per share	$ 24.97	$ 31.41	$ 0

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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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.

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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).

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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).

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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.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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.

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