Stock-Based Compensation - Schedule of Restricted Stock Unit Activity and Weighted Average Grant Date Fair Value (Details) - Restricted Stock Units	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Shares
Non-vested, beginning balance (in shares) | shares	311,000
Granted (in shares) | shares	240,539
Forfeited (in shares) | shares	(21,574)
Vested (in shares) | shares	(108,413)
Non-vested, ending balance (in shares) | shares	421,552
Weighted-Average Grant Date Fair Value
Non-vested, beginning balance (in dollars per share) | $ / shares	$ 42.66
Granted (in dollars per share) | $ / shares	48.97
Forfeited (in dollars per share) | $ / shares	47.55
Vested (in dollars per share) | $ / shares	36.47
Non-vested, ending balance (in dollars per share) | $ / shares	$ 47.60