Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of year				$ 95,524				$ 53,090	$ 95,524	$ 53,090	$ 48,963
Balance, beginning of year				(42,304)				(35,886)	(42,304)	(35,886)	(31,715)
Additions due to acquisitions									0	45,426	6,720
Amortization	$ 0	$ 0	$ 0	$ (200)	$ (17,600)	$ (747)	$ (900)	$ (2,000)	(16,517)	(9,410)	(6,268)
Fully amortized portion									(29,637)	(2,992)	(1,293)
Write-off due to the asset financing reorganization									0	0	(804)
Balance, end of year	64,187				95,524				64,187	95,524	53,090
Net CDI and CRI, end of year	(27,821)				(42,304)				(27,821)	(42,304)	(35,886)
Net CDI and CRI, end of year	$ 36,366				$ 53,220				36,366	53,220	17,204
CDI and CRI [Member]
Finite-lived Intangible Assets [Roll Forward]
Fully amortized portion									(29,637)	(2,992)	(1,293)
Write-off due to the asset financing reorganization									0	0	1,300
Pacific Western Equipment Finance [Member]
Finite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit									1,363	0	0
CDI and CRI [Member] | Pacific Western Equipment Finance [Member]
Finite-lived Intangible Assets [Roll Forward]
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit									$ (1,700)	$ 0	$ 0