v2.4.0.6
Employee Retirement Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Benefits earned during the period $ 447 $ 369 $ 832 $ 768
Interest cost on projected benefit obligation 608 573 1,186 1,175
Expected return on plan assets (525) (492) (1,044) (974)
Net amortization and deferral 441 430 822 900
Net pension expense $ 971 $ 880 $ 1,796 $ 1,869