Share Repurchase Program (Details) - USD ($)		9 Months Ended
	Feb. 12, 2015	Sep. 30, 2018	Sep. 30, 2017	May 04, 2017
Equity [Abstract]
Stock Repurchase Program, Authorized Amount	$ 20,000,000			$ 30,000,000
Stock Repurchase Program, Period in Force	2 years
Stock Repurchased During Period, Shares		2,667,732	1,028,654
Stock Repurchased During Period, Value		$ 25,598,000	$ 10,000,000
Treasury Stock Acquired, Average Cost Per Share		$ 9.60	$ 9.76