Share Repurchase (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Mar. 15, 2016
Equity [Abstract]
Stock repurchase program, authorized amount				$ 10,000,000.0
Treasury stock, shares acquired (shares)			264,058
Purchase of treasury shares	$ 0	$ 51,000	$ 2,700,000
Stock repurchase program, remaining authorized repurchase amount			$ 7,300,000