Income Taxes (Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amount
Income tax computed at statutory federal tax rate									$ 10,179	$ 10,469	$ 5,890
Tax-exempt interest income									(645)	(565)	(574)
Investments in tax credit funds									(314)	(387)	(497)
Bank owned life insurance									2,183	(14)	(44)
Other, net									107	22	(179)
Total income tax expense	$ 2,301	$ 4,381	$ 2,510	$ 2,318	$ 1,665	$ 2,310	$ 2,471	$ 3,079	$ 11,510	$ 9,525	$ 4,596
Rate
Income tax computed at statutory federal tax rate									35.00%	35.00%	34.30%
Tax-exempt interest income									(2.20%)	(1.90%)	(3.40%)
Investments in tax credit funds									(1.10%)	(1.30%)	(2.90%)
Bank owned life insurance									7.50%	(0.10%)	(0.30%)
Other, net									0.40%	0.10%	(0.90%)
Total income tax expense									39.60%	31.80%	26.80%