Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net Earnings	$ 10,900,000	$ 14,600,000	$ 14,800,000	$ 5,400,000	$ 7,700,000	$ 9,700,000	$ 12,700,000	$ 3,300,000	$ 45,800,000	$ 33,400,000	$ (6,200,000)
Basic - Weighted Average Shares Outstanding									18,118,486	17,940,438	17,695,390
Effect of dilutive securities									334,659	398,131	0
Diluted - Weighted Average Shares Outstanding									18,453,145	18,338,569	17,695,390
Basic Earnings per Share	$ 0.60	$ 0.81	$ 0.82	$ 0.30	$ 0.43	$ 0.54	$ 0.71	$ 0.18	$ 2.53	$ 1.86	$ (0.35)
Diluted (in dollars per share)	$ 0.59	$ 0.79	$ 0.81	$ 0.29		$ 0.52	$ 0.69	$ 0.18	$ 2.48	$ 1.82	$ (0.35)
Anti-dilutive securities excluded from earnings per share calculation (in shares)									552,402	293,356	711,212