Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
CDI and CRI Balance, beginning of period	$ 93,824	$ 95,524	$ 53,090	$ 95,524	$ 53,090
Fully amortized portion	(17,311)	0	0	(17,311)	0
Reduction due to sale of PWEF leasing unit	0	(1,363)	0	(1,363)	0
CDI and CRI Balance, end of period	76,513	93,824	53,090	76,513	53,090
Accumulated Amortization, beginning of period	(45,687)	(42,304)	(37,387)	(42,304)	(35,886)
Amortization	(4,371)	(4,746)	(1,502)	(9,117)	(3,003)
Accumulated Amortization, end of period	(32,747)	(45,687)	(38,889)	(32,747)	(38,889)
Net CDI and CRI, end of period	43,766	48,137	14,201	43,766	14,201
CDI and CRI
Finite-Lived Intangible Assets [Line Items]
Fully amortized portion	(17,311)	0	0	(17,311)	0
Reduction due to sale of PWEF leasing unit	$ 0	$ (1,700)	$ 0	$ (1,700)	$ 0