Income Taxes (Details 4) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Tax credits:
Tax Credit Carryforward, Amount	$ 7,622
Minimum Tax Credit
Tax credits:
Tax Credit Carryforward, Amount	$ 7,444
Expiration date of Minimum tax credit carryforward	Carry forward indefinitely
Other Tax Credits
Tax credits:
Tax Credit Carryforward, Amount	$ 178
Expiration year of other tax credit carryforward, beginning	2016
Expiration year of other tax credit carryforward, ending	2021
Domestic Tax Authority
State net operating loss carryforward (net):
Net operating loss	$ 84,769
Federal capital losses	$ 3,785
Expiration year of operating loss carryforwards	2028
Expiration year of capital loss carryforwards	2019
State and Local Jurisdiction
State net operating loss carryforward (net):
Net operating loss	$ 3,249
Expiration year of operating loss carryforwards, beginning	2016
Expiration year of operating loss carryforwards, ending	2035