Capital Stock (Additional Information) (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) stockholder $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Apr. 30, 2015 $ / shares	Mar. 31, 2015 $ / shares	Dec. 31, 2014 $ / shares
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01	$ 1.00
Preferred stock, issued (in shares) | shares	0	0
Preferred stock, authorized (in shares) | shares	500,000	500,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01			$ 0.10
Common stock	$ 249	$ 247
Capital in excess of par value	$ 82,387	76,746
Number of Stockholders | stockholder	11,434
Common stock, shares, outstanding (in shares) | shares	17,232,146
Scenario, Adjustment
Class of Stock [Line Items]
Common stock		(2,200)
Capital in excess of par value		$ 2,200