Shareholders' Equity and Stock Compensation (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended					6 Months Ended		3 Months Ended		6 Months Ended			6 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Apr. 18, 2014	Dec. 31, 2013	Apr. 16, 2013 2013 Stock Incentive Plan [Member]	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Restricted Shares [Member]	Jun. 30, 2013 Restricted Shares [Member]	Jun. 30, 2014 Restricted Shares [Member]	Jun. 30, 2013 Restricted Shares [Member]	Dec. 31, 2013 Restricted Shares [Member]	Jun. 30, 2014 Employee Stock Option [Member]	Jun. 30, 2014 Employee Stock Option [Member]	Jun. 30, 2013 Employee Stock Option [Member]	Jun. 30, 2014 Employee Stock Option [Member]	Jun. 30, 2013 Employee Stock Option [Member]	Apr. 18, 2014 Merger with Sterling Financial Corporation [Member] Restricted Stock Units (RSUs) [Member]	Apr. 18, 2014 Merger with Sterling Financial Corporation [Member] Employee Stock Option [Member]	Apr. 18, 2014 Merger with Sterling Financial Corporation [Member] Common Stock [Member]	Apr. 18, 2014 Merger with Sterling Financial Corporation [Member] Warrant [Member]
Shareholders Equity and Share-Based Payments [Line Items]
Conversion of stock, shares issued																				994,214	439,921	104,385,087
Conversion of stock, shares converted																							2,960,238
Number of securities called by each warrant					1.671
Warrant exercise price (usd per share)	$ 12.73		$ 12.73		$ 12.88
Warrants outstanding	2,995,130		2,995,130
Common stock, shares authorized	400,000,000		400,000,000		400,000,000	200,000,000
Shares of common stock for issuance under the plan							4,000,000
Compensation cost	$ 3,567,000	$ 1,000,000	$ 5,101,000	$ 2,222,000
Total income tax benefit recognized related to stock-based compensation	1,373,000	415,000	1,964,000	889,000
Accelerated compensation expense	3,600,000
Total intrinsic value of options exercised	1,400,000	130,000	2,800,000	137,000
Cash received from exercise of stock options	3,600,000	813,000	6,200,000	846,000												3,394,000	29,000	4,291,000	52,000
Stock options granted	0		440,000
Total fair value of restricted stock shares/units vested and released										900,000	500,000	6,400,000	1,800,000
Restricted stock units outstanding, shares								770,000	95,000	1,453,000		1,453,000		992,000
Restricted stock units outstanding, weighted average grant dare fair value, usd per share								$ 18.36	$ 10.41	$ 15.54		$ 15.54		$ 12.79
Total unrecognized compensation cost related to nonvested stock awards								11,992,000		14,500,000		14,500,000			568,000
Expected recognized over a weighted-average period, years								2 years 8 months 27 days				1 year 8 months 23 days			1 year 11 months 12 days
Income tax benefits received	2,500,000	257,000	5,700,000	775,000
Net tax benefit from stock options exercised			1,200,000
Tax deficiency from stock options exercised				$ 33,000