Pension Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets
Plan assets at January 1	$ 17,281
Plan assets at fair value at December 31	16,212	$ 17,281
Pension Benefits [Member]
Change in benefit obligation
Benefit obligation at January 1	25,863	21,491
Service cost	177	227	$ 198
Interest cost	947	970	882
Actuarial (gain) loss	(998)	4,451
Assumed administrative expenses	(177)	(227)
Benefits paid	(1,075)	(1,049)
Benefit obligation at December 31	24,737	25,863	21,491
Change in plan assets
Plan assets at January 1	17,281	16,731
Actual return on plan assets	(358)	888
Administrative expenses	(177)	(227)
Employer contributions	541	938
Benefits paid	(1,075)	(1,049)
Plan assets at fair value at December 31	16,212	17,281	$ 16,731
Funded status
Benefit obligation in excess of plan assets at December 31	$ (8,525)	$ (8,582)