Equity-Based Compensation (Summary of Information about Restricted Stock Units and Weighted Average Grant Date Fair Value) (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Restricted stock units
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period (in shares) | shares	374,432
Granted (in shares) | shares	82,328
Vested (in shares) | shares	(213,448)
Forfeited (in shares) | shares	(5,870)
Balance at end of period (in shares) | shares	237,442
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period (in USD per share) | $ / shares	$ 33.74
Granted (in USD per share) | $ / shares	56.81
Vested (in USD per share) | $ / shares	34.14
Forfeited (in USD per share) | $ / shares	40.92
Balance at end of period (in USD per share) | $ / shares	$ 41.15
Common stock
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period (in shares) | shares	0
Granted (in shares) | shares	4,134
Vested (in shares) | shares	(4,134)
Forfeited (in shares) | shares	0
Balance at end of period (in shares) | shares	0
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period (in USD per share) | $ / shares	$ 0
Granted (in USD per share) | $ / shares	45.98
Vested (in USD per share) | $ / shares	45.98
Forfeited (in USD per share) | $ / shares	0
Balance at end of period (in USD per share) | $ / shares	$ 0
Performance stock units
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period (in shares) | shares	329,257
Granted (in shares) | shares	160,426
Vested (in shares) | shares	(81,366)
Forfeited (in shares) | shares	(28,556)
Balance at end of period (in shares) | shares	407,289
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period (in USD per share) | $ / shares	$ 38.53
Granted (in USD per share) | $ / shares	55.98
Vested (in USD per share) | $ / shares	40.77
Forfeited (in USD per share) | $ / shares	40.27
Balance at end of period (in USD per share) | $ / shares	$ 45.00
Deferred Stock Units
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period (in shares) | shares	34,752
Granted (in shares) | shares	12,402
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Balance at end of period (in shares) | shares	47,154
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period (in USD per share) | $ / shares	$ 34.21
Granted (in USD per share) | $ / shares	45.98
Vested (in USD per share) | $ / shares	0
Forfeited (in USD per share) | $ / shares	0
Balance at end of period (in USD per share) | $ / shares	$ 37.30
Minimum | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Percent of grants awarded based on target threshold	0.00%
Maximum | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Percent of grants awarded based on target threshold	200.00%
2015 Equity Incentive Plan | Return On Invested Capital | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Award performance period	1 year
2015 Equity Incentive Plan | Gross Profit Threshold | Minimum | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Award performance period	2 years
2015 Equity Incentive Plan | Gross Profit Threshold | Maximum | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Award performance period	3 years
2015 Equity Incentive Plan | Total Shareholder Return | Performance stock units
Weighted Average Grant Date Fair Value (in dollars per share)
Award performance period	3 years