Stock-Based Awards - Summary of RSU Activity (Details) - Time-based restricted stock units - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Outstanding shares, beginning balance (in shares)	25,000
Granted (in shares)	87,000
Vested (in shares)	(12,500)	0	0
Forfeited (in shares)	0
Outstanding shares, ending balance (in shares)	99,500	25,000
Weighted Average Exercise Price
Weighted average grant date fair value, beginning balance (in dollars per share)	$ 33.43
Weighted average grant date fair value, granted (in dollars per share)	29.03
Weighted average grant date fair value, vested (in dollars per share)	33.43
Weighted average grant date fair value, forfeited (in dollars per share)	0
Weighted average grant date fair value, ending balance (in dollars per share)	$ 29.58	$ 33.43