Shareholders' Equity - Narrative (Details) - USD ($)		1 Months Ended	9 Months Ended
	Feb. 25, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Equity, Class of Treasury Stock [Line Items]
Common equity issued		$ 5,000,000
Common stocks
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period, shares			0	88,650
Stock repurchased and retired during period, value				$ 625,000
Stock Repurchase Program, February 2016
Equity, Class of Treasury Stock [Line Items]
Authorized amount of stock repurchase program	$ 2,100,000.0
Stock repurchase program, period	1 year
Private placement
Equity, Class of Treasury Stock [Line Items]
Common equity issued (in shares)		800,000
Offering price per share (in dollars per share)		$ 6.25	$ 6.25
Receivable from issuance of stock		$ 625,000	$ 625,000