Treasury Stock Narrative Data (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased per quarter	2,500
Purchase of treasury stock, cost	$ 13	$ 107
Number of shares of common stock repurchased since inception of stock repurchase program	17,693
Cost per share of common stock repurchased since inception of stock repurchase program, low	$ 17.86
Cost per share of common stock repurchased since inception of stock repurchase program, high	$ 48.82
Total cost of common stock repurchased since inception of stock repurchase program	$ 472
Number of shares of common stock reserved for issuance and sale under the DRIP	200,000
Common Stock
Equity, Class of Treasury Stock [Line Items]
Purchase of treasury stock, shares	300	2,209
Shares issued under the DRIP	2,503
Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Purchase of treasury stock, cost	$ 13	$ 107