Stockholders' Equity (Summary of Stock Option Activity and Related Information) (Detail)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Number of Shares (Options)
Outstanding as of December 31, 2014 | shares	37,000
Exercised | shares	(37,000)
Weighted Average Exercise Price
Outstanding as of December 31, 2014 | $ / shares	$ 15.45
Exercised | $ / shares	$ 15.45