Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of contributions made to multi-employer plans

Contributions we made to the multi-employer plans for the years ended December 31, 2014, 2013 and 2012 are included in the table below (in thousands):

Benefit Plan	2014		2013		2012
Pension Plan	$	2,807	$	2,765	$	2,506
Health Plan	8,470		8,522		8,020
Other plans	5,838		6,006		6,025
Total plan contributions	$	17,115	$	17,293	$	16,551