Organization and Summary of Significant Accounting Policies - Reconciliation of Basic and Dilutive Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	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
Accounting Policies [Abstract]
Net income									$ 13,920	$ 39,189	$ 15,100
Weighted average shares outstanding:
Basic (in shares)	29,160	29,077	29,064	28,883	27,687	28,241	28,299	28,209	29,047	28,064	27,996
Dilutive effect of stock options, restricted stock, and warrants (in shares)									195	436	411
Diluted (in shares)	29,379	29,127	29,064	28,883	28,258	28,563	28,666	28,693	29,242	28,500	28,407
Earnings per share:
Basic (in usd per share)	$ 0.86	$ 0.30	$ (0.18)	$ (0.50)	$ 0.52	$ 0.52	$ 0.11	$ 0.25	$ 0.48	$ 1.40	$ 0.54
Dilutive (in usd per share)	$ 0.86	$ 0.30	$ (0.18)	$ (0.50)	$ 0.52	$ 0.51	$ 0.11	$ 0.24	$ 0.48	$ 1.38	$ 0.53