Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ (195,278)	$ (168,047)	$ (98,575)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	(32,896)	(29,009)	(15,689)
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount	13,992	8,274	4,472
Income Tax Reconciliation Change In Cash Surrender Value Of Life Insurance	1,544	884	739
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	1,439	2,441	3,567
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	(1,257)	(1,005)	(6,792)
Nondeductible acquisition-related expense	0	(876)	(2,994)
Deferred Tax Assets, Tax Deferred Expense	2,268	5,529	(157)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	8,689	2,917	3,520
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(4,271)	(1,625)	(3,982)
Income Tax Expense (Benefit), Continuing Operations, Discontinued Operations, Extraordinary Items	$ 205,770	$ 180,517	$ 115,891