Income Taxes (Details Textual) - USD ($) $ in Thousands, shares in Millions		12 Months Ended
	Oct. 06, 2015	Dec. 31, 2016	Dec. 31, 2015
Statutory Federal Income Tax Rate		35.00%
Income Taxes Receivable		$ 7,400	$ 6,200
Deferred Tax Assets, Valuation Allowance		100,920	121,138
Unused Federal operating loss carryforwards		0
Unused State operating loss carryforwards		1,100,000
Unused Federal capital loss carryforwards		31,800
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		16,500
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit			800
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		600	(2,400)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 300	900
Minimum [Member]
State operating loss carryforwards expiration date		Dec. 31, 2017
Foreign tax credit carryforward expiration date		Jan. 01, 2017
Open Tax Year		2009
Maximum [Member]
State operating loss carryforwards expiration date		Dec. 31, 2036
Federal capital loss carryforward expiration date		12/31/2018
Foreign tax credit carryforward expiration date		Dec. 31, 2021
Open Tax Year		2015
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax Examination, Year under Examination		2009
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax Examination, Year under Examination		2014
Internal Revenue Service (IRS) [Member] | Minimum [Member]
Income Tax Examination, Year under Examination		2009
Internal Revenue Service (IRS) [Member] | Maximum [Member]
Income Tax Examination, Year under Examination		2012
Shares Of Common Stock [Member] | Square 1 Financial, Inc. [Member]
Stock Issued During Period, Shares, New Issues	18.1
Unrecognized Tax Rate Benefit (Negative Benefit) [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 1,100	$ 4,300