Stockholders' Equity (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Class of Stock [Line Items]
Common stock issued from treasury stock		103,750
Restricted shares of common stock granted	888,104
Restricted shares of common stock vesting period, (in years)	3 years
Treasury Stock Value		$ 10,898		$ 12,635
Treasury shares acquired		216,870	253,056
Repurchase Program [Member]
Class of Stock [Line Items]
Treasury Stock Value		$ 3,400
Treasury Stock Acquired, Average Cost Per Share		$ 6.67
Stock Repurchase Program, Increase In Authorized Amount		$ 10,500
Treasury shares acquired		513,600