XML 69 R34.htm IDEA: XBRL DOCUMENT v2.4.0.8
Summary of Significant Accounting Policies - Weighted-Average Common Stock Used to Calculate Basic and Diluted Earnings per Share (Detail)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accounting Policies [Abstract]                      
Weighted-average common stock for calculating basic earnings per share 25,717 25,649 25,354 25,003 24,847 24,785 24,765 24,639 25,433 24,759 24,349
Effect of potentially dilutive securities from equity-based compensation                 493 397 411
Weighted-average common stock for calculating diluted earnings per share 26,211 26,095 25,818 25,435 25,216 25,106 25,149 25,183 25,926 25,156 24,760