Employee Benefit Plans (Details 6) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	$ 16,731	$ 14,894
Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	15,884	7,830	[1]
Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	847	7,064	[1]
Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Short-term Investments [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	574	1,030
Short-term Investments [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Short-term Investments [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	574	1,030	[1]
Short-term Investments [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Corporate stocks - common [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	4,054	3,368
Corporate stocks - common [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	4,054	3,368	[1]
Corporate stocks - common [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Corporate stocks - common [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Mutual funds - equity [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	5,918	1,784
Mutual funds - equity [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	5,918	1,784	[1]
Mutual funds - equity [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Mutual funds - equity [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Collective funds [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value		5,430
Collective funds [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value		0	[1]
Collective funds [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value		5,430	[1]
Collective funds [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value		0
Exchange traded funds [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	5,458	2,244
Exchange traded funds [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	5,458	2,244	[1]
Exchange traded funds [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Exchange traded funds [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Government [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	454	434
Government [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	454	434	[1]
Government [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Government [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0
Asset backed [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	273	604
Asset backed [Member] | Level 1 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	0	0	[1]
Asset backed [Member] | Level 2 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	273	604	[1]
Asset backed [Member] | Level 3 [Member]
Company's pension plans' asset valuation in the fair value hierarchy levels
Plan assets at fair value	$ 0	$ 0

[1] Certain amounts have been revised from a Level 1 to a Level 2 fair value hierarchy classification to conform to the current year presentation, which had no effect on previously reported consolidated results and was not material to the footnotes to the consolidated financial statements.