Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 1,088	$ 1,120
Common stock, par value (in usd per share)	$ 0.4867	$ 0.4867
Common stock, shares authorized	25,000,000	25,000,000