Pension Plan and Employee Benefits, 401 (K) Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
401(k) Plan [Abstract]
401(k) Plan expense	$ 1,201	$ 1,145	$ 2,569	$ 2,424
Other Subsidiaries [Member]
401(k) Plan [Abstract]
401(k) Plan expense	$ 200	$ 200	$ 500	$ 600