Pension Plans (Contributions) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Qualified Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Contributions by employer		$ 10,000	$ 10,000
Estimated future employer contributions in next fiscal year	[1]	10,000
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Contributions by employer		534	$ 819
Estimated future employer contributions in next fiscal year		$ 530

[1] The Company contributed $10.0 million to the qualified pension plan in January 2016 and does not intend to make any further contributions to the qualified pension plan in 2016.