Organization and Summary of Significant Accounting Policies - Earnings per share (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share
Weighted average number of common shares outstanding	86,000,754	89,759,626	90,318,839
Effect of non-participatory equity compensation (in shares)			36,000
Weighted average number of common shares outstanding, including effect of dilutive securities	86,000,754	89,759,626	90,354,839