Consolidated Statements of Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements	$ 95	$ 102	$ 287	$ 304
Accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities	41	0	245	328
Income tax expense from reclassification	$ (19)	$ (36)	$ (15)	$ 8