Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 Segment shares	Dec. 31, 2015 USD ($)
Significant Accounting Policies [Line Items]
Number of reportable segments	3
Remaining maturities of highly-liquid investments	three months or less
Share based compensation arrangements vesting period	3 years
Share based compensation arrangements requisite service period	3 years
Percent of shares vest on the third anniversary of the grant	40.00%
Percent of increments over the subsequent two anniversary dates	30.00%
Adjustments for New Accounting Principle, Early Adoption
Significant Accounting Policies [Line Items]
Reclassification of unamortized debt issuance costs from other long-term assets to a reduction in long-term debt | $		$ 1.6
Liability Based Awards
Significant Accounting Policies [Line Items]
Share based compensation arrangements requisite service period	3 years
Equity Based Awards
Significant Accounting Policies [Line Items]
Share based compensation arrangements requisite service period	3 years
Other Restricted Stock
Significant Accounting Policies [Line Items]
Share based compensation arrangements requisite service period	5 years
Stock Options
Significant Accounting Policies [Line Items]
Share based compensation arrangements requisite service period	5 years
Stock options granted | shares	0
Minimum | Restricted Stock
Significant Accounting Policies [Line Items]
Share based compensation arrangements vesting period	3 years
Maximum | Restricted Stock
Significant Accounting Policies [Line Items]
Share based compensation arrangements vesting period	5 years
Building | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	15 years
Building | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	40 years
Equipment | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Equipment | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	12 years
Computer Software, Development Costs | Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Computer Software, Development Costs | Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Pursuit
Significant Accounting Policies [Line Items]
Number of business lines	4