Employee Benefit Plans - Schedule of Changes in Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 24,482	$ 25,190	$ 28,360
Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	3,834
Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,795	10,006
Foreign Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	291
Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	9,479
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,687	1,580
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,482	19,921
Fair Value, Inputs, Level 1 | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,795	10,006
Fair Value, Inputs, Level 1 | Foreign Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	291
Fair Value, Inputs, Level 1 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	9,479
Fair Value, Inputs, Level 1 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,687	145
Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	5,269
Fair Value, Inputs, Level 2 | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	3,834
Fair Value, Inputs, Level 2 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 | Foreign Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,435
Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Foreign Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0