Note 9 - Stock-based Compensation (Details) - Stock Option Activity (USD $)	6 Months Ended	12 Months Ended				1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2014 Firstbank Plans [Member]
Note 9 - Stock-based Compensation (Details) - Stock Option Activity [Line Items]
Outstanding, shares						0
Outstanding, weighted average exercise price
Options exercisable at period-end						255,373
Options exercisable at period-end						$ 16.44
Granted	0	0	0	0	0	0
Granted
Assumed as part of merger						282,178
Assumed as part of merger						$ 15.48
Exercised						(3,075)
Exercised						$ 7.80
Forfeited or expired						0
Forfeited or expired
Outstanding, shares						279,103
Outstanding, weighted average exercise price						$ 15.57