Capital Stock (Additional Information) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 stockholder	Dec. 31, 2013
Equity [Abstract]
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, authorized	500,000	500,000
Number of Shareholders	7,472
Common Stock, Shares, Outstanding	17,318,680