Employee Benefit Plans (Details 12) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	$ 110,862	$ 99,857
Level 1
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	15,898	12,909
Level 2
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	94,964	86,948
Level 3
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Mutual funds
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	15,898	12,909
Mutual funds | Level 1
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	15,898	12,909
Mutual funds | Level 2
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Mutual funds | Level 3
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Money market fund
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	987	779
Money market fund | Level 1
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Money market fund | Level 2
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	987	779
Money market fund | Level 3
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Equity based
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	40,702	40,807
Equity based | Level 1
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Equity based | Level 2
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	40,702	40,807
Equity based | Level 3
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Fixed income securities
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	53,275	45,362
Fixed income securities | Level 1
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	0	0
Fixed income securities | Level 2
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	53,275	45,362
Fixed income securities | Level 3
Employee Benefit Plans [Line Items]
Fair value of the assets (by asset category) in the Company's defined benefit pension plan	$ 0	$ 0