XML 23 R73.htm IDEA: XBRL DOCUMENT v3.2.0.727
Pension Information - Components of Net Periodic Pension Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]        
Service cost   $ 94   $ 170
Interest cost $ 156 201 $ 312 381
Expected return on plan assets (283) (312) (566) (592)
Other components 70 89 140 132
Net periodic pension cost (benefit) $ (57) $ 72 $ (114) $ 91