Shareholders' Equity (Details) (USD $)	0 Months Ended			3 Months Ended		12 Months Ended
	May 28, 2013	Feb. 01, 2013	Aug. 21, 2012	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Shareholders' Equity [Abstract]
Common stock repurchase, authorized amount		$ 15,000,000
Stock repurchased during period, shares						253,000
Stock repurchased during period, aggregate purchase price						1,500,000
Common stock repurchase, remaining authorized amount				13,500,000		13,500,000
Increase in quarterly cash dividend, percentage	10.00%
Quarterly cash dividend per share of common stock outstanding approved	$ 0.0275		$ 0.025	$ 0.0275	$ 0.0250
Dividend payment from cash on hand				$ 772,000	$ 687,000