Employee Benefit Plan Employee Benefit Plan (Details) $ in Thousands			12 Months Ended
	Jul. 31, 2016	May 31, 2011	Dec. 31, 2016 USD ($) employee	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Vesting percentage of employer contribution	100.00%
Costs recognized | $			$ 142	$ 96	$ 92
Number of participants | employee			179
Deferred Compensation Arrangement with Individual, Percent of Base Salary That May Be Deferred			50.00%
Deferred Compensation Arrangement with Individual, Percent of Bonus That May Be Deferred			100.00%
Deferred Compensation, Period 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Arrangement with Individual, Maximum Contractual Term			5 years
Deferred Compensation, Period 2 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Arrangement with Individual, Maximum Contractual Term			10 years
Deferred Compensation, Period 3 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Arrangement with Individual, Maximum Contractual Term			15 years
Up To 3%
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution, percent match on employee contribution	50.00%	100.00%
Employer matching contribution on salary of employee		3.00%
3% to 3.99%
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution, percent match on employee contribution		3.00%
3% to 3.99% | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution on salary of employee		3.00%
3% to 3.99% | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution on salary of employee		3.99%
4% to 4.99%
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution, percent match on employee contribution		3.50%
4% to 4.99% | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution on salary of employee	4.00%	4.00%
4% to 4.99% | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer matching contribution on salary of employee		4.99%
5% Or More
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contribution, percent match on employee contribution		4.00%
Employer matching contribution on salary of employee		5.00%