Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jan. 01, 2020	Dec. 31, 2019		Dec. 31, 2018
Operating lease right-of-use assets	$ 28,900		$ 26,792		$ 0
Operating lease liabilities	30,900		28,861	[1]	0
Rent-related liabilities	2,900
Reduction of deferred tax assets	222
Cumulative effect of change in accounting principle			722
Held to maturity securities, amortized cost			0		10,415
Held to maturity securities, fair value			0		10,316
Unrealized losses in accumulated other comprehensive income			(11,237)		$ (28,309)
Retained Earnings [Member]
Cumulative effect of change in accounting principle	722		$ 722
Adjustments for Change in Accounting Principle [Domain]
Held to maturity securities, amortized cost	10,400
Held to maturity securities, fair value	10,300
Unrealized losses in accumulated other comprehensive income	$ (75)
Minimum [Member]
Cumulative effect of change in accounting principle		$ 4,200
Range of increase in ACL		5,500
Range of increase in DTA		1,300
Maximum [Member]
Cumulative effect of change in accounting principle		6,500
Range of increase in ACL		8,500
Range of increase in DTA		$ 2,000

[1] Includes short-term operating lease liabilities of $2.5 million.